GRADE / GRAAD 11 NOVEMBER 2012 MATHEMATICS P1 / WISKUNDE V1 MEMORANDUM
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1 Province of the EASTERN CAPE EDUCATION NATIONAL SENIOR CERTIFICATE NASIONALE SENIOR SERTIFIKAAT GRADE / GRAAD 11 NOVEMBER 2012 MATHEMATICS P1 / WISKUNDE V1 MEMORANDUM MARKS: PUNTE: 150 This memorandum consists of 12 pages Hierdie memorandum bestaan uit 12 bladsye. 1
2 2 MATHEMATIC P1 / WISKUNDE V1 (NOVEMBER 2012) QUESTION 1 / VRAAG or/of simplify LHS vereenvoudig LK standard form standaardvorm factorisation faktorisering for both values of x vir beide x waardes factorisation faktorisering -4 and/en 1 notation/ notasie (3) standard form standaardvorm method/substitution metode/ simplification one mark for each answer een punt vir elke antwoord (5) 1.2 2(9 6y + ) x = 3 y substitution simplification simplification factorisation faktorisering both values of/ albei waardes van y each value of/ elke waarde van x (8)
3 (NOVEMBER 2012) WISKUNDE V substitution simplification quadratic expression kwadratiese uitdrukking completion of square / kwadraatsvoltooiing = 50 x = 2 divide by 2 deel deur 2 same base selfde basis answer/ antwoord (3) [27] 3
4 4 MATHEMATIC P1 / WISKUNDE V1 (NOVEMBER 2012) QUESTION2 / VRAAG (0 ; 1) 2.2 Asymptotes of : y-intercept y-afsnit 1 mark for each correct answer 1 punt vir elke korrekte antwoord f(x): y = 0 h(x): x = 0 y = 5 (1) (3) 2.3 f and h are decreasing f en h verminder mark for each correct curve / h f 1 punt vir elke korrekte kromme g mark for asymptote y=5 1 punt vir asimptoot y=5 2.5 (1) 2.6 answer antwoord (1) [12]
5 (NOVEMBER 2012) WISKUNDE V1 5 QUESTION 3 / VRAAG T n = 3n T 2 = = 13 T 2 12 False/Vals Shape number, n Patroon nommer Number of white triangles Aantal wit driehoeke Number of black triangles Aantal swart driehoeke Total number of triangles Totale aantal driehoeke substitution in general term in algemene term simplification T 2 12 deduction / afleiding mark per correct entries 1 punt per korrekte inskrywing (6) = 144 triangles/driehoeke answer/ antwoord 5
6 6 MATHEMATIC P1 / WISKUNDE V1 (NOVEMBER 2012) There is a common second difference of 1, so the sequence is quadratic. Daar is ʼn tweede gemene verskil van 1, daarom is die reeks kwadraties. T = a + bn + c d = 1 a = = b = = = - OR/OF value of a waarde van a equation / vergelyking value of b waarde van b equation / vergelyking c = = 0 - = 0 value of c waarde van c general term algemene term (7) equating to 190 gelykstel aan 190 simplification standard form standaardvorm factorisation faktorisering n = 20 (5) [24]
7 (NOVEMBER 2012) WISKUNDE V1 7 QUESTION 4 / VRAAG substitution of 12% and 6 van 12% en 6 substitution of R van R answer antwoord (3) / per maand answer antwoord (1) substituting into correct formula 1 + in die korrekte formule simplifying = 0,16075 r = 0,16075 value of r waarde van r = 16.08% p.a substitution simplifying OR/OF answer antwoord OR/OF R7 097, substitution simplifying answer antwoord substituting simplifying answer antwoord 7
8 8 MATHEMATIC P1 / WISKUNDE V1 (NOVEMBER 2012) 4.4 ( sub.ver sub.ver method / metode answer antwoord (5) [25]
9 9 WISKUNDE V1 (NOVEMBER 2012) QUESTION 5 / VRAAG ( ) simplify vereenvoudig (0 ; 1) 5.2 ( ) ( ) y = 0 ) ( both answers/ albei antwoorde 5.3 y 7 f (3) -1-1 (3) f: x-intercepts x-afsnitte y-intercept y-afsnit turning point draaipunt shape / vorm x (4;-2) -3 7 g: intercepts afsnitte asymptotes asimptote shape / vorm -4-5 g -6 (7) 5.4 ; x 4 9 (1) [18]
10 10 MATHEMATIC P1 / WISKUNDE V1 (NOVEMBER 2012) QUESTION 6 / VRAAG f(x) = 1 + a. (0 ; 0) 0 = 1 + a. 0 = 1 + a.1 a = f(x) = 1 f(-15) = 1 = 0, f(x) = (x ; 0,5) 0,5 = 1 = 1 0,5 = 0,5 = = x = -1 h(x) = f(x 2) = 1 substitution simplifying substitution answer antwoord substitution express with same base uitdruk met dieselfde basis answer antwoord h(x) (3) [9]
11 (NOVEMBER 2012) WISKUNDE V1 11 QUESTION 7 / VRAAG AB 4 units/eenhede equating to 0 gelykstel aan 0 factors /faktore x = -3 x = 1 AB = 4 units/eenhede /eenhede OC = 3 units/eenhede (5) 7.2 x = -1 x = f(-1) = -(-1) 2-2(-1) + 3 substituting = = 4 simplification answer antwoord (3) m AC = numerator teller = 1 denominator noemer m = 1 subs/verv. (1;0) in y = x + c 0 = 1 + c c = -1 y = x 1 answer / antwoord (3) m = 1 y = x + c 0 = 1 + c c = -1 [17] 11
12 12 MATHEMATIC P1 / WISKUNDE V1 (NOVEMBER 2012) QUESTION 8 / VRAAG ℕ0 8.2 Number of table models / Getal tafelmodelle y 8.3 x = 35 y = 20 x + y = 50 4x + 5y = 200 feasible region gangbare gebied x Number of wall models Getal muurmodelle (5) (25 ; 20) (30 ; 20) (35 ; 15) (35 ; 12) (25 ; 20) (30 ; 20) (35 ; 15) (35 ; 12) 8.4 P = 20x+ 10y P = 20x + 10y (1) 8.4 Max. profit: R850 for 35 wall models and 15 table models Mak. wins: R850 vir 35 muurmodelle en 15 tafelmodelle Min. profit : R700 for 25 wall models and 20 table models Min, wins : R700 vir 25 muurmodelle en 20 tafelmodelle for max profit vir mak. wins for min profit vir mak. wins [18] TOTAL/TOTAAL: 150
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