# Review for Calculus Rational Functions, Logarithms & Exponentials

Save this PDF as:

Size: px
Start display at page:

## Transcription

1 Definition and Domain of Rational Functions A rational function is defined as the quotient of two polynomial functions. F(x) = P(x) / Q(x) The domain of F is the set of all real numbers except those for which Q(x) = 0. Here are some examples of rational functions: g(x) = (x 2 + 1) / (x - 1) h(x) = (2x + 1) / (x + 3) Example: Find the domain of each function given below. a. g(x) = (x - 1) / (x - 2) b. h(x) = (x + 2) / x Solution a. For function g to be defined, the denominator x - 2 must be different from zero or x not equal to 2. Hence the domain of g is given by (,2) (2, + ) For function h to be defined, the denominator x must be different from zero or x not equal to 0. Hence the domain of h is given by (,0) (0, + ) Vertical Asymptotes of Rational Functions Let f(x) = 1/x. f(x) is not defined at x = 0 (division by zero is not allowed). However what is the behavior of the graph "close" to zero? In the tables below are values of function f as x approaches zero from the right (x >0) and as x approaches zero from the left (x < 0). We note that as x approaches zero from the right, f(x) takes larger values. Is there a limit to the values of f(x)? No, f(x) increases without bound. 1

2 We also note that as x approaches zero from the left, f(x) takes smaller values. Is there a limit to the values of f(x)? No, f(x) decreases without bound. Therefore line x = 0 is called the vertical asymptote and it is given by the zero of the denominator. Let The domain of f is the set of all real numbers except 3, since 3 makes the denominator zero and the division by zero is not allowed in mathematics. However we can try to find out how does the graph of f behave close to 3. Let us evaluate function f at values of x close to 3 from the left. The values are shown in the table below: X f (x) *10 Let us now evaluate f at values of x close to 3 from the right. X f (x) *10 The graph of f is shown below. 2

3 Notes 1) As x approaches 3 from the left or by values smaller than 3, f (x) decreases without bound. 2) As x approaches 3 from the right or by values larger than 3, f (x) increases without bound. We say that the line x = 3, broken line, is the vertical asymptote for the graph of f( the value that makes the denominator equal to zero). In general, the line x = a is a vertical asymptote for the graph of f if f (x) either increases or decreases without bound as x approaches a from the right or from the left. This is symbolically written as: Horizontal Asymptotes of Rational Functions Let f(x) = 1/x. What is the behavior of the graph of f as x becomes very large or very small? The table below show values of f when x becomes very large, and when x becomes very small. 3

4 As x takes smaller values or as x takes larger values, f(x) takes values close to zero and the graph approaches the line horizontal line y = 0. This line is called the horizontal asymptote. Let 1 Let x increase and find values of f (x). x f (x) Let x decrease and find values of f (x). x f (x) As x increases or decreases, the numerator is dominated by the term 2x and the numerator has only one term x. Therefore f(x) takes values close to 2x / x = 2. See graphical behavior below. 4

5 In general, the line y = b is a horizontal asymptote for the graph of f if f (x) approaches a constant b as x increases or decreases without bound. How to find the horizontal asymptote? Let f be a rational function defined as follows Theorem m is the degree of the polynomial in the numerator and n is the degree of the polynomial in the numerator. case 1: For m < n, the horizontal asymptote is the line y = 0. case 2: For m = n, the horizontal asymptote is the line y = a m / b n case 3: For m > n, there is no horizontal asymptote. 5

6 Example 1: Let f be a rational function defined by a) Find the domain of f. b) Find the x and y intercepts of the graph of f. c) Find the vertical and horizontal asymptotes for the graph of f if there are any. d) Use your answers to parts a, b and c above to sketch the graph of function f. Solution: a) The domain of f is the set of all real numbers except x = 1, since this value of x makes the denominator zero. b) The x intercept is found by solving f (x) = 0 or x+1 = 0. The x intercept is at the point (-1, 0). The y intercept is at the point (0, f(0)) = (0, -1). c) The vertical asymptote is given by the zero of the denominator x = 1. The degree of the numerator is 1 and the degree of the denominator is 1. They are equal and according to the theorem above, the horizontal asymptote is the line y = 1 / 1 = 1 d) Although parts a, b and c give some important information about the graph of f, we still need to construct a sign table for function f in order to be able to sketch with ease. The sign of f (x) changes at the zeros of the numerator and denominator. To find the sign table, we proceed as in solving rational inequalities. The zeros of the numerator and denominator which are -1 and 1 divides the real number line into 3 intervals: (, 1), ( 1,1), (1, + ) We select a test value within each interval and find the sign of f (x). In In (, 1) ( 1,1), select -2 and find f (-2) = ( ) / (-2-1) = 1 / 3 > 0., select 0 and find f(0) = -1 < 0. In ( 1, + ), select 2 and find f (2) = ( 2 + 1) / (2-1) = 3 > 0. 6

7 Let us put all the information about f in a table. X f (x) + 0 x- intercepts In the table above V.A means vertical asymptote. - V.A + To sketch the graph of f, we start by sketching the x and y intercepts and the vertical and horizontal asymptotes in broken lines. See sketch below. We now start sketching the graph of f starting from the left. In the interval (, 1) f (x) is positive hence the graph is above the x axis. Starting from left, we sketch f taking into account the fact that y = 1 is a horizontal asymptote: The graph of f is close to this line on the left. See sketch below. 7

8 Between ( 1,1) f (x) is negative, hence the graph of f is below the x axis. (0, -1) is a y intercept and x =1 is a vertical asymptote: as x approaches 1 from left f (x) deceases without bound because f (x) < 0 in( -1, 1). See sketch below. ( 1, + ), f (x) > 0 hence the graph is above the x axis. As x approaches 1 from the right, the graph of f For increases without bound ( f(x) >0 ). Also as x increases, the graph of f approaches y = 1 the horizontal asymptote. See sketch below. 8

9 We now put all "pieces" of the graph of f together to obtain the graph of f. 9

10 Try this Example : Let f be a rational function defined by a) Find the domain of f. b) Find the x and y intercepts of the graph of f. f (x) = (-x + 2) / (x + 4) c) Find the vertical and horizontal asymptotes for the graph of f if there are any. d) Use your answers to parts a, b and c above to sketch the graph of function f. Find Equation Of Rational Function From Graph Example1 : Find the equation of the rational function f of the form f(x) = (x + a) / (bx + c) whose graph has an x intercept at (2, 0), a vertical asymptote at x = -1 and a horizontal asymptote at y = 1/2. Solution : The x intercept(s) is/are found by equating f(x) = 0, which implies the numerator should be zero. Furthermore, the numerator is equal to zero at x = 2. x + a 0 = x + a = 0 bx + c 2 + a = 0 a. Solve the above equation for a. a = -2 b. The horizontal asymptote is given by ratio of the leading coefficients in the numerator and denominator. 1 / b = 1/2 c. Solve for b b = 2 d. The vertical asymptote is given by the zero of the denominator. At x = -1 the denominator in f(x) has to be equal to zero. -b + c = 0 e. Substitute 2 for b in the above equation -2 + c = 0 10

11 f. Solve the above equation for c c = 2 g. The equation of the rational function is given by f(x) = (x - 2)/(2x + 2) Try this Example : Find the equation of the rational function f of the form f(x) = (ax - 2 ) / (bx + c) whose graph has an x intercept at (1, 0), a vertical asymptote at x = -1 and a horizontal asymptote at y = 2. 11

12 Graphs of Rational Functions Review for Calculus This section is for identifying the graph of a rational function given its formula. Example 1 : Identify the graph of the function f(x) = 2x/(x - 1) Solution: The given function f(x) = 2x/(x - 1) has a vertical asymptote at x = 1 and a horizontal asymptote at y = 2. If you examine the 4 graphs given above only graph b has a vertical asymptote at x = 1 and a horizontal asymptote at y = 2. 12

13 Example 2 : Identify the graph of the function f(x) = x 2 / (x 2-1) Solution: The given function f(x) = x 2 / (x 2-1) has 2 vertical asymptotes at x = 1 and x = -1 and a horizontal asymptote at y = 1. If you examine the 4 graphs given above only graph b has these characteristics. 13

14 Exponential Functions If b is any number such that b>0 and b 1then an exponential function is a function in the form, f(x) = b x where b is called the base and x can be any real number. Notice that the x is now in the exponent and the base is a fixed number. Example: Sketch the graph of f(x) = 2 x and g(x) = (1/2) x on the same axis system. Solution Pick some value of x and do some function evaluation. Here is the sketch of the two graphs. Special exponential function: e The special exponential function is the natural logarithm function e. Here it is, f(x) = e x where e = Note the difference between f(x) = b x and f(x) = e x. In the first case b is any number that is meets the restrictions given above while e is a very specific number. Also note that e is an irrational number like π. Example: Sketch the graph of f(x) = e x. Solution: Let s first build up a table of values for this function. To get these evaluation (with the exception of x = 0) you will need to use a calculator. Make sure that you can use your calculator and verify these numbers. Here is a sketch of this graph. 14

15 Notice that this is an increasing graph as we should expect since e = > 1. Try this: g(x) = 5e 1-x - 4 Exponential Growth & Decay kt N( t) = N 0e. In this In many applications, a quantity N grows or decays, according to the function function, N is a function of time t, and No is the value of N at time t=0. If k is a positive constant, then kt kt N( t) = N 0e is called an exponential growth function. If k is a negative constant, then N ( t) = N 0e is called an exponential decay function. Example: Find the exponential growth function for a town whose population was 16,400 in 1990 and 20,200 in Solution kt We need to determine No and k in N( t) = N 0e. If we represent the year 1990 by t=0, then our given data are N(0)=16,400 and N(10)=20,200. Because No is defined to be N(0), we know that No= 16,400. To kt determine k, substitute t=10 and No=16,400 in N( t) = N 0e to produce k.10 N(10)=16,400 e 20,200= 16,400 e 10k 20,200 = e 10k 16,400 20,200 ln = 10k 16, ,200 ln = k 10 16, k The exponential growth function is N ( t ) 16,400 e t Logistic Model kt The population growth function is given by P ( t) = P o e. The logistic model is a restricted growth model that takes into consideration the effects of limited resources. The population at time t 0 is given by c P ( t ) = 1 bt + ae Where c is the carrying capacity (the maximum population that can be supported by available resources as t ) and b is a positive constant called the Growth Rate Constant. 15

16 The initial population is P 0 = P(0). To find the constant a, use the formula c P0 a = P 0 Example: At the beginning of 2002, the coyote population in the wilderness area was estimated at 200. By the beginning of 2004, the population had increased to 250. A park ranger estimates that the carrying capacity of the wilderness area is 500 coyotes. Use the given data to determine the growth rate constant, b, for the logistic model of this coyote population. Solution: If we represent the beginning of the year 2002 by t=0, then the beginning of the year 2004 will be represented by t=2. In the logistic model, make the following substitutions: P(2)=250, c=500 and c P a = P = = c ae P( t) = P e bt ( 2) = b = b e.2 + e b ) = 250(1 500 b e = 250 b.2 1.5e = 1 b.2 1 e = b = ln( )

17 b e P ( t) = t Review for Calculus Logarithms Logarithmic functions are the inverse of exponential functions. For example, the inverse of y = a x is y = log a x, which is the same as x = a y. Note: Logarithms written without a base are understood to be base 10. This definition is explained by knowing how to convert exponential equations to logarithmic form, and logarithmic equations to exponential form. Examples: 1. Convert to logarithmic form: 8 = 2 x Solution: Remember that the logarithm is the exponent. x = log Convert to exponential form: y = log 3 5 Solution: Remember that the logarithm is the exponent. 3 y = 5 How to convert from exponential to logarithmic form and from logarithmic to exponential form? Properties of Logarithms For any positive numbers x and y, log a (x * y) = log a x + log a y when a 1. log a (x/y) = log a x - log a y. Example: Simplify: log 2 x + log 2 6. Solution: log 2 (x * 6) = log 2 6x For any positive numbers x and p, log a x p = plog a x. Example: Simplify: log b 9 -x Solution: 9 xlog b log a a = 1 & log a 1 = 0 17

### MA107 Precalculus Algebra Exam 2 Review Solutions

MA107 Precalculus Algebra Exam 2 Review Solutions February 24, 2008 1. The following demand equation models the number of units sold, x, of a product as a function of price, p. x = 4p + 200 a. Please write

### Definition 2.1 The line x = a is a vertical asymptote of the function y = f(x) if y approaches ± as x approaches a from the right or left.

Vertical and Horizontal Asymptotes Definition 2.1 The line x = a is a vertical asymptote of the function y = f(x) if y approaches ± as x approaches a from the right or left. This graph has a vertical asymptote

### MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

Math 110 Review for Final Examination 2012 Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Match the equation to the correct graph. 1) y = -

### Course Name: Course Code: ALEKS Course: Instructor: Course Dates: Course Content: Textbook: Dates Objective Prerequisite Topics

Course Name: MATH 1204 Fall 2015 Course Code: N/A ALEKS Course: College Algebra Instructor: Master Templates Course Dates: Begin: 08/22/2015 End: 12/19/2015 Course Content: 271 Topics (261 goal + 10 prerequisite)

### Functions and Equations

Centre for Education in Mathematics and Computing Euclid eworkshop # Functions and Equations c 014 UNIVERSITY OF WATERLOO Euclid eworkshop # TOOLKIT Parabolas The quadratic f(x) = ax + bx + c (with a,b,c

### Exponential and Logarithmic Functions

Exponential and Logarithmic Functions Exponential Functions Overview of Objectives, students should be able to: 1. Evaluate exponential functions. Main Overarching Questions: 1. How do you graph exponential

### Lecture 3 : The Natural Exponential Function: f(x) = exp(x) = e x. y = exp(x) if and only if x = ln(y)

Lecture 3 : The Natural Exponential Function: f(x) = exp(x) = Last day, we saw that the function f(x) = ln x is one-to-one, with domain (, ) and range (, ). We can conclude that f(x) has an inverse function

### Official Math 112 Catalog Description

Official Math 112 Catalog Description Topics include properties of functions and graphs, linear and quadratic equations, polynomial functions, exponential and logarithmic functions with applications. A

### MAT12X Intermediate Algebra

MAT12X Intermediate Algebra Workshop I - Exponential Functions LEARNING CENTER Overview Workshop I Exponential Functions of the form y = ab x Properties of the increasing and decreasing exponential functions

### Rational Polynomial Functions

Rational Polynomial Functions Rational Polynomial Functions and Their Domains Today we discuss rational polynomial functions. A function f(x) is a rational polynomial function if it is the quotient of

### CHAPTER FIVE. Solutions for Section 5.1. Skill Refresher. Exercises

CHAPTER FIVE 5.1 SOLUTIONS 265 Solutions for Section 5.1 Skill Refresher S1. Since 1,000,000 = 10 6, we have x = 6. S2. Since 0.01 = 10 2, we have t = 2. S3. Since e 3 = ( e 3) 1/2 = e 3/2, we have z =

### Main page. Given f ( x, y) = c we differentiate with respect to x so that

Further Calculus Implicit differentiation Parametric differentiation Related rates of change Small variations and linear approximations Stationary points Curve sketching - asymptotes Curve sketching the

### Situation: Dividing Linear Expressions

Situation: Dividing Linear Expressions Date last revised: June 4, 203 Michael Ferra, Nicolina Scarpelli, Mary Ellen Graves, and Sydney Roberts Prompt: An Algebra II class has been examining the product

### Zero: If P is a polynomial and if c is a number such that P (c) = 0 then c is a zero of P.

MATH 11011 FINDING REAL ZEROS KSU OF A POLYNOMIAL Definitions: Polynomial: is a function of the form P (x) = a n x n + a n 1 x n 1 + + a x + a 1 x + a 0. The numbers a n, a n 1,..., a 1, a 0 are called

### 3.3. GRAPHS OF RATIONAL FUNCTIONS. Some of those sketching aids include: New sketching aids include:

3.3. GRAPHS OF RATIONAL FUNCTIONS In a previous lesson you learned to sketch graphs by understanding what controls their behavior. Some of those sketching aids include: y-intercept (if any) x-intercept(s)

### MSLC Workshop Series Math 1148 1150 Workshop: Polynomial & Rational Functions

MSLC Workshop Series Math 1148 1150 Workshop: Polynomial & Rational Functions The goal of this workshop is to familiarize you with similarities and differences in both the graphing and expression of polynomial

PRE-CALCULUS GRADE 12 [C] Communication Trigonometry General Outcome: Develop trigonometric reasoning. A1. Demonstrate an understanding of angles in standard position, expressed in degrees and radians.

3.2 LOGARITHMIC FUNCTIONS AND THEIR GRAPHS Copyright Cengage Learning. All rights reserved. What You Should Learn Recognize and evaluate logarithmic functions with base a. Graph logarithmic functions.

### Pre-Calculus Review Lesson 1 Polynomials and Rational Functions

If a and b are real numbers and a < b, then Pre-Calculus Review Lesson 1 Polynomials and Rational Functions For any real number c, a + c < b + c. For any real numbers c and d, if c < d, then a + c < b

### Polynomial and Rational Functions

Polynomial and Rational Functions Quadratic Functions Overview of Objectives, students should be able to: 1. Recognize the characteristics of parabolas. 2. Find the intercepts a. x intercepts by solving

### Precalculus A 2016 Graphs of Rational Functions

3-7 Precalculus A 2016 Graphs of Rational Functions Determine the equations of the vertical and horizontal asymptotes, if any, of each function. Graph each function with the asymptotes labeled. 1. ƒ(x)

MA 134 Lecture Notes August 20, 2012 Introduction The purpose of this lecture is to... Introduction The purpose of this lecture is to... Learn about different types of equations Introduction The purpose

### 2.7. The straight line. Introduction. Prerequisites. Learning Outcomes. Learning Style

The straight line 2.7 Introduction Probably the most important function and graph that you will use are those associated with the straight line. A large number of relationships between engineering variables

### Rational Functions 5.2 & 5.3

Math Precalculus Algebra Name Date Rational Function Rational Functions 5. & 5.3 g( ) A function is a rational function if f ( ), where g( ) and h( ) are polynomials. h( ) Vertical asymptotes occur at

### MATH 095, College Prep Mathematics: Unit Coverage Pre-algebra topics (arithmetic skills) offered through BSE (Basic Skills Education)

MATH 095, College Prep Mathematics: Unit Coverage Pre-algebra topics (arithmetic skills) offered through BSE (Basic Skills Education) Accurately add, subtract, multiply, and divide whole numbers, integers,

### WEEK #2: Cobwebbing, Equilibria, Exponentials and Logarithms

WEEK #2: Cobwebbing, Equilibria, Exponentials and Logarithms Goals: Analyze Discrete-Time Dynamical Systems Logs and Exponentials Textbook reading for Week #2: Read Sections 1.6 1.7 2 Graphical Analysis

### Solutions to Self-Test for Chapter 4 c4sts - p1

Solutions to Self-Test for Chapter 4 c4sts - p1 1. Graph a polynomial function. Label all intercepts and describe the end behavior. a. P(x) = x 4 2x 3 15x 2. (1) Domain = R, of course (since this is a

### Polynomials Classwork

Polynomials Classwork What Is a Polynomial Function? Numerical, Analytical and Graphical Approaches Anatomy of an n th -degree polynomial function Def.: A polynomial function of degree n in the vaiable

### Equations. #1-10 Solve for the variable. Inequalities. 1. Solve the inequality: 2 5 7. 2. Solve the inequality: 4 0

College Algebra Review Problems for Final Exam Equations #1-10 Solve for the variable 1. 2 1 4 = 0 6. 2 8 7 2. 2 5 3 7. = 3. 3 9 4 21 8. 3 6 9 18 4. 6 27 0 9. 1 + log 3 4 5. 10. 19 0 Inequalities 1. Solve

### 55x 3 + 23, f(x) = x2 3. x x 2x + 3 = lim (1 x 4 )/x x (2x + 3)/x = lim

Slant Asymptotes If lim x [f(x) (ax + b)] = 0 or lim x [f(x) (ax + b)] = 0, then the line y = ax + b is a slant asymptote to the graph y = f(x). If lim x f(x) (ax + b) = 0, this means that the graph of

### a. all of the above b. none of the above c. B, C, D, and F d. C, D, F e. C only f. C and F

FINAL REVIEW WORKSHEET COLLEGE ALGEBRA Chapter 1. 1. Given the following equations, which are functions? (A) y 2 = 1 x 2 (B) y = 9 (C) y = x 3 5x (D) 5x + 2y = 10 (E) y = ± 1 2x (F) y = 3 x + 5 a. all

### 2.3. Finding polynomial functions. An Introduction:

2.3. Finding polynomial functions. An Introduction: As is usually the case when learning a new concept in mathematics, the new concept is the reverse of the previous one. Remember how you first learned

### Algebra II End of Course Exam Answer Key Segment I. Scientific Calculator Only

Algebra II End of Course Exam Answer Key Segment I Scientific Calculator Only Question 1 Reporting Category: Algebraic Concepts & Procedures Common Core Standard: A-APR.3: Identify zeros of polynomials

### Algebra Nation MAFS Videos and Standards Alignment Algebra 2

Section 1, Video 1: Linear Equations in One Variable - Part 1 Section 1, Video 2: Linear Equations in One Variable - Part 2 Section 1, Video 3: Linear Equations and Inequalities in Two Variables Section

### Items related to expected use of graphing technology appear in bold italics.

- 1 - Items related to expected use of graphing technology appear in bold italics. Investigating the Graphs of Polynomial Functions determine, through investigation, using graphing calculators or graphing

### Polynomials can be added or subtracted simply by adding or subtracting the corresponding terms, e.g., if

1. Polynomials 1.1. Definitions A polynomial in x is an expression obtained by taking powers of x, multiplying them by constants, and adding them. It can be written in the form c 0 x n + c 1 x n 1 + c

### Larson, R. and Boswell, L. (2016). Big Ideas Math, Algebra 2. Erie, PA: Big Ideas Learning, LLC. ISBN

ALG B Algebra II, Second Semester #PR-0, BK-04 (v.4.0) To the Student: After your registration is complete and your proctor has been approved, you may take the Credit by Examination for ALG B. WHAT TO

### Algebra I Vocabulary Cards

Algebra I Vocabulary Cards Table of Contents Expressions and Operations Natural Numbers Whole Numbers Integers Rational Numbers Irrational Numbers Real Numbers Absolute Value Order of Operations Expression

### Rational Functions ( )

Rational Functions A rational function is a function of the form r P Q where P and Q are polynomials. We assume that P() and Q() have no factors in common, and Q() is not the zero polynomial. The domain

### Introduction to polynomials

Worksheet 4.5 Polynomials Section 1 Introduction to polynomials A polynomial is an expression of the form p(x) = p 0 + p 1 x + p 2 x 2 + + p n x n, (n N) where p 0, p 1,..., p n are constants and x os

### Simplify the rational expression. Find all numbers that must be excluded from the domain of the simplified rational expression.

MAC 1105 Final Review Simplify the rational expression. Find all numbers that must be excluded from the domain of the simplified rational expression. 1) 8x 2-49x + 6 x - 6 A) 1, x 6 B) 8x - 1, x 6 x -

### Polynomial & Rational Functions

4 Polynomial & Rational Functions 45 Rational Functions A function f is a rational function if there exist polynomial functions p and q, with q not the zero function, such that p(x) q(x) for all x for

### Analyzing Polynomial and Rational Functions

Analyzing Polynomial and Rational Functions Raja Almukahhal, (RajaA) Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) To access a customizable version of this book, as

### Section 4.4 Rational Functions and Their Graphs

Section 4.4 Rational Functions and Their Graphs p( ) A rational function can be epressed as where p() and q() are q( ) 3 polynomial functions and q() is not equal to 0. For eample, is a 16 rational function.

### Section 3.7 Rational Functions

Section 3.7 Rational Functions A rational function is a function of the form where P and Q are polynomials. r(x) = P(x) Q(x) Rational Functions and Asymptotes The domain of a rational function consists

### Rational Functions and Their Graphs

Objectives Rational Functions and Their Graphs Section.6 Find domain of rational functions. Use transformations to graph rational functions. Use arrow notation. Identify vertical asymptotes. Identify horizontal

### Developmental Math Course Outcomes and Objectives

Developmental Math Course Outcomes and Objectives I. Math 0910 Basic Arithmetic/Pre-Algebra Upon satisfactory completion of this course, the student should be able to perform the following outcomes and

### D f = (2, ) (x + 1)(x 3) (b) g(x) = x 1 solution: We need the thing inside the root to be greater than or equal to 0. So we set up a sign table.

. Find the domains of the following functions: (a) f(x) = ln(x ) We need x > 0, or x >. Thus D f = (, ) (x + )(x 3) (b) g(x) = x We need the thing inside the root to be greater than or equal to 0. So we

### Algebra 2 Year-at-a-Glance Leander ISD 2007-08. 1st Six Weeks 2nd Six Weeks 3rd Six Weeks 4th Six Weeks 5th Six Weeks 6th Six Weeks

Algebra 2 Year-at-a-Glance Leander ISD 2007-08 1st Six Weeks 2nd Six Weeks 3rd Six Weeks 4th Six Weeks 5th Six Weeks 6th Six Weeks Essential Unit of Study 6 weeks 3 weeks 3 weeks 6 weeks 3 weeks 3 weeks

### CCSS: F.IF.7.e., F.IF.8.b MATHEMATICAL PRACTICES: 3 Construct viable arguments and critique the reasoning of others

7.1 Graphing Exponential Functions 1) State characteristics of exponential functions 2) Identify transformations of exponential functions 3) Distinguish exponential growth from exponential decay CCSS:

### i is a root of the quadratic equation.

13 14 SEMESTER EXAMS 1. This question assesses the student s understanding of a quadratic function written in vertex form. y a x h k where the vertex has the coordinates V h, k a) The leading coefficient

### Infinite Algebra 1 supports the teaching of the Common Core State Standards listed below.

Infinite Algebra 1 Kuta Software LLC Common Core Alignment Software version 2.05 Last revised July 2015 Infinite Algebra 1 supports the teaching of the Common Core State Standards listed below. High School

### 6 Rational Inequalities, (In)equalities with Absolute value; Exponents and Logarithms

AAU - Business Mathematics I Lecture #6, March 16, 2009 6 Rational Inequalities, (In)equalities with Absolute value; Exponents and Logarithms 6.1 Rational Inequalities: x + 1 x 3 > 1, x + 1 x 2 3x + 5

### Asymptotes. Definition. The vertical line x = a is called a vertical asymptote of the graph of y = f(x) if

Section 2.1: Vertical and Horizontal Asymptotes Definition. The vertical line x = a is called a vertical asymptote of the graph of y = f(x) if, lim x a f(x) =, lim x a x a x a f(x) =, or. + + Definition.

### Clear & Understandable Math

Chapter 1: Basic Algebra (Review) This chapter reviews many of the fundamental algebra skills that students should have mastered in Algebra 1. Students are encouraged to take the time to go over these

### Algebra 1 Chapter 3 Vocabulary. equivalent - Equations with the same solutions as the original equation are called.

Chapter 3 Vocabulary equivalent - Equations with the same solutions as the original equation are called. formula - An algebraic equation that relates two or more real-life quantities. unit rate - A rate

### ALGEBRA REVIEW LEARNING SKILLS CENTER. Exponents & Radicals

ALGEBRA REVIEW LEARNING SKILLS CENTER The "Review Series in Algebra" is taught at the beginning of each quarter by the staff of the Learning Skills Center at UC Davis. This workshop is intended to be an

### What are the place values to the left of the decimal point and their associated powers of ten?

The verbal answers to all of the following questions should be memorized before completion of algebra. Answers that are not memorized will hinder your ability to succeed in geometry and algebra. (Everything

### Graphing Rational Functions

Graphing Rational Functions A rational function is defined here as a function that is equal to a ratio of two polynomials p(x)/q(x) such that the degree of q(x) is at least 1. Examples: is a rational function

### Algebra and Geometry Review (61 topics, no due date)

Course Name: Math 112 Credit Exam LA Tech University Course Code: ALEKS Course: Trigonometry Instructor: Course Dates: Course Content: 159 topics Algebra and Geometry Review (61 topics, no due date) Properties

### List the elements of the given set that are natural numbers, integers, rational numbers, and irrational numbers. (Enter your answers as commaseparated

MATH 142 Review #1 (4717995) Question 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Description This is the review for Exam #1. Please work as many problems as possible

### 3. Exponential and Logarithmic functions

3. ial and s ial and ic... 3.1. Here are a few examples to remind the reader of the definitions and laws for expressions involving exponents: 2 3 = 2 2 2 = 8, 2 0 = 1, 2 1 = 1 2, 2 3 = 1 2 3 = 1 8, 9 1/2

### CHAPTER 5: Exponential and Logarithmic Functions

MAT 171 Precalculus Algebra Dr. Claude Moore Cape Fear Community College 5.2 CHAPTER 5: Exponential and Logarithmic Functions 5.1 Inverse Functions 5.2 Exponential Functions and Graphs 5.3 Logarithmic

### 6.4 Logarithmic Equations and Inequalities

6.4 Logarithmic Equations and Inequalities 459 6.4 Logarithmic Equations and Inequalities In Section 6.3 we solved equations and inequalities involving exponential functions using one of two basic strategies.

### Microeconomic Theory: Basic Math Concepts

Microeconomic Theory: Basic Math Concepts Matt Van Essen University of Alabama Van Essen (U of A) Basic Math Concepts 1 / 66 Basic Math Concepts In this lecture we will review some basic mathematical concepts

### Calculus Card Matching

Card Matching Card Matching A Game of Matching Functions Description Give each group of students a packet of cards. Students work as a group to match the cards, by thinking about their card and what information

### The Point-Slope Form

7. The Point-Slope Form 7. OBJECTIVES 1. Given a point and a slope, find the graph of a line. Given a point and the slope, find the equation of a line. Given two points, find the equation of a line y Slope

### CHAPTER 3. Exponential and Logarithmic Functions

CHAPTER 3 Exponential and Logarithmic Functions Section 3.1 (e-book 5.1-part 1) Exponential Functions and Their Graphs Definition 1: Let. An exponential function with base a is a function defined as Example

### WARM UP EXERCSE. 2-1 Polynomials and Rational Functions

WARM UP EXERCSE Roots, zeros, and x-intercepts. x 2! 25 x 2 + 25 x 3! 25x polynomial, f (a) = 0! (x - a)g(x) 1 2-1 Polynomials and Rational Functions Students will learn about: Polynomial functions Behavior

### Sec36NotesDone.notebook April 19, Sec. 3.6 Rational Functions and their Graphs. A rational function is of the form:

Sec. 3.6 Rational Functions and their Graphs A rational function is of the form: where P(x) and Q(x) are Polynomials The Domain of r(x) is all values of x where Q(x) is not equal to zero. The simplest

### The data is more curved than linear, but not so much that linear regression is not an option. The line of best fit for linear regression is

CHAPTER 5 Nonlinear Models 1. Quadratic Function Models Consider the following table of the number of Americans that are over 100 in various years. Year Number (in 1000 s) 1994 50 1996 56 1998 65 2000

### Higher Education Math Placement

Higher Education Math Placement Placement Assessment Problem Types 1. Whole Numbers, Fractions, and Decimals 1.1 Operations with Whole Numbers Addition with carry Subtraction with borrowing Multiplication

### 6 EXTENDING ALGEBRA. 6.0 Introduction. 6.1 The cubic equation. Objectives

6 EXTENDING ALGEBRA Chapter 6 Extending Algebra Objectives After studying this chapter you should understand techniques whereby equations of cubic degree and higher can be solved; be able to factorise

### APPLICATIONS OF DIFFERENTIATION

4 APPLICATIONS OF DIFFERENTIATION APPLICATIONS OF DIFFERENTIATION So far, we have been concerned with some particular aspects of curve sketching: Domain, range, and symmetry (Chapter 1) Limits, continuity,

### FINAL EXAM SECTIONS AND OBJECTIVES FOR COLLEGE ALGEBRA

FINAL EXAM SECTIONS AND OBJECTIVES FOR COLLEGE ALGEBRA 1.1 Solve linear equations and equations that lead to linear equations. a) Solve the equation: 1 (x + 5) 4 = 1 (2x 1) 2 3 b) Solve the equation: 3x

### REVIEW SHEETS INTERMEDIATE ALGEBRA MATH 95

REVIEW SHEETS INTERMEDIATE ALGEBRA MATH 95 A Summary of Concepts Needed to be Successful in Mathematics The following sheets list the key concepts which are taught in the specified math course. The sheets

### McMurry University Pre-test Practice Exam. 1. Simplify each expression, and eliminate any negative exponent(s).

1. Simplify each expression, and eliminate any negative exponent(s). a. b. c. 2. Simplify the expression. Assume that a and b denote any real numbers. (Assume that a denotes a positive number.) 3. Find

### Midterm I Review:

Midterm I Review: 1.1 -.1 Monday, October 17, 016 1 1.1-1. Functions Definition 1.0.1. Functions A function is like a machine. There is an input (x) and an output (f(x)), where the output is designated

### The x-intercepts of the graph are the x-values for the points where the graph intersects the x-axis. A parabola may have one, two, or no x-intercepts.

Chapter 10-1 Identify Quadratics and their graphs A parabola is the graph of a quadratic function. A quadratic function is a function that can be written in the form, f(x) = ax 2 + bx + c, a 0 or y = ax

### LOGARITHMIC FUNCTIONS

CHAPTER LOGARITHMIC FUNCTIONS The heavenly bodies have always fascinated and challenged humankind. Our earliest records contain conclusions, some false and some true, that were believed about the relationships

### Chapter 4. Polynomial and Rational Functions. 4.1 Polynomial Functions and Their Graphs

Chapter 4. Polynomial and Rational Functions 4.1 Polynomial Functions and Their Graphs A polynomial function of degree n is a function of the form P = a n n + a n 1 n 1 + + a 2 2 + a 1 + a 0 Where a s

### This is a square root. The number under the radical is 9. (An asterisk * means multiply.)

Page of Review of Radical Expressions and Equations Skills involving radicals can be divided into the following groups: Evaluate square roots or higher order roots. Simplify radical expressions. Rationalize

### 3.1. RATIONAL EXPRESSIONS

3.1. RATIONAL EXPRESSIONS RATIONAL NUMBERS In previous courses you have learned how to operate (do addition, subtraction, multiplication, and division) on rational numbers (fractions). Rational numbers

### CORRELATED TO THE SOUTH CAROLINA COLLEGE AND CAREER-READY FOUNDATIONS IN ALGEBRA

We Can Early Learning Curriculum PreK Grades 8 12 INSIDE ALGEBRA, GRADES 8 12 CORRELATED TO THE SOUTH CAROLINA COLLEGE AND CAREER-READY FOUNDATIONS IN ALGEBRA April 2016 www.voyagersopris.com Mathematical

### Prentice Hall Mathematics: Algebra 1 2007 Correlated to: Michigan Merit Curriculum for Algebra 1

STRAND 1: QUANTITATIVE LITERACY AND LOGIC STANDARD L1: REASONING ABOUT NUMBERS, SYSTEMS, AND QUANTITATIVE SITUATIONS Based on their knowledge of the properties of arithmetic, students understand and reason

### Homework # 3 Solutions

Homework # 3 Solutions February, 200 Solution (2.3.5). Noting that and ( + 3 x) x 8 = + 3 x) by Equation (2.3.) x 8 x 8 = + 3 8 by Equations (2.3.7) and (2.3.0) =3 x 8 6x2 + x 3 ) = 2 + 6x 2 + x 3 x 8

### Math 120 Final Exam Practice Problems, Form: A

Math 120 Final Exam Practice Problems, Form: A Name: While every attempt was made to be complete in the types of problems given below, we make no guarantees about the completeness of the problems. Specifically,

### Rational functions are defined for all values of x except those for which the denominator hx ( ) is equal to zero. 1 Function 5 Function

Section 4.6 Rational Functions and Their Graphs Definition Rational Function A rational function is a function of the form that h 0. f g h where g and h are polynomial functions such Objective : Finding

### Some Lecture Notes and In-Class Examples for Pre-Calculus:

Some Lecture Notes and In-Class Examples for Pre-Calculus: Section.7 Definition of a Quadratic Inequality A quadratic inequality is any inequality that can be put in one of the forms ax + bx + c < 0 ax

### 100. In general, we can define this as if b x = a then x = log b

Exponents and Logarithms Review 1. Solving exponential equations: Solve : a)8 x = 4! x! 3 b)3 x+1 + 9 x = 18 c)3x 3 = 1 3. Recall: Terminology of Logarithms If 10 x = 100 then of course, x =. However,

### Algebra Graphing an Exponential Function

Graphing an Exponential Function Graphing an exponential or logarithmic function is a process best described by example. Each step of the process is described and illustrated in the examples over the next

### Review of Fundamental Mathematics

Review of Fundamental Mathematics As explained in the Preface and in Chapter 1 of your textbook, managerial economics applies microeconomic theory to business decision making. The decision-making tools

### Algebra I Pacing Guide Days Units Notes 9 Chapter 1 ( , )

Algebra I Pacing Guide Days Units Notes 9 Chapter 1 (1.1-1.4, 1.6-1.7) Expressions, Equations and Functions Differentiate between and write expressions, equations and inequalities as well as applying order

### Mathematics Chapter 8 and 10 Test Summary 10M2

Quadratic expressions and equations Expressions such as x 2 + 3x, a 2 7 and 4t 2 9t + 5 are called quadratic expressions because the highest power of the variable is 2. The word comes from the Latin quadratus

### Wentzville School District Formal Algebra II

Wentzville School District Formal Algebra II Unit 6 - Rational Functions Unit Title: Rational Functions Course: Formal Algebra II Brief Summary of Unit: In this unit, students will graph and analyze the

### Name: where Nx ( ) and Dx ( ) are the numerator and

Oblique and Non-linear Asymptote Activity Name: Prior Learning Reminder: Rational Functions In the past we discussed vertical and horizontal asymptotes of the graph of a rational function of the form m

### 3.4 Limits at Infinity - Asymptotes

3.4 Limits at Infinity - Asymptotes Definition 3.3. If f is a function defined on some interval (a, ), then f(x) = L means that values of f(x) are very close to L (keep getting closer to L) as x. The line

### Worksheet 4.7. Polynomials. Section 1. Introduction to Polynomials. A polynomial is an expression of the form

Worksheet 4.7 Polynomials Section 1 Introduction to Polynomials A polynomial is an expression of the form p(x) = p 0 + p 1 x + p 2 x 2 + + p n x n (n N) where p 0, p 1,..., p n are constants and x is a