PREREQUISITES FOR CALCULUS (MATH1113) AND PRECALCULUS (MATH1102) This pamphlet describes the prerequisites for MATH1102 (Precalculus Mathematics) and MATH1113 (Introductory Calculus I) and provides practice questions on the prerequisite topics (a separate pamphlet is available for Statistics and Finite Mathematics). The formal prerequisite of MATH1102 is Grade XI and XII Math AND the Mathematics Placement Test, or MATH0020 passed in the last three years with a grade of C or higher). The formal prerequisite of MATH1113 is either MATH1103, or high school precalculus mathematics AND the Mathematics Placement Test. A separate brochure with information on the Mathematics Placement Test is available from the Mathematics Department. IF YOU HAVE NOT YET TAKEN THE PLACEMENT TEST the questions here will give you practice in the required topics. Note that the actual placement test consists of multiple choice questions so that it can be marked quickly. Calculators are permitted for the placement test (and needed for these practice questions, with a scientific calculator required for some MATH1113 prerequisite questions). IF YOU HAVE ALREADY TAKEN THE PLACEMENT TEST or a prerequisite course the questions here cover the topics that you will be expected to know at the start of the course. It is strongly recommended that you review these questions just before the course begins so you will find it easier to learn the new course material. One major reason why students have trouble with these courses is that they are weak on the prerequisites. Since mathematics is cumulative, difficulty with algebra will cause a lot more difficulty with calculus. Prerequisites for MATH1102 (Precalculus Mathematics) Covered in MATH0020 (College Algebra), or in high school mathematics. A. Polynomial Expressions B. Linear Equations in One Variable C. Equations of Lines D. Systems of Equations in Two Variables E. Factorization F. Quadratic Equations G. Rational Expressions H. Square Roots Prerequisites for MATH1113 (Introductory Calculus I) Covered in MATH1102/1103 (Precalculus), or Grade XI, XII, 0. ALL PREREQUISITE TOPICS FOR MATH1102 (above) A. Functions B. Quadratic Functions C. Polynomial and Rational Functions D. Exponents and Radicals E. Conic Sections F. Exponential and Logarithmic Functions G. Trigonometry & precalculus mathematics References: For MATH1102 try textbooks with titles like "College Algebra", and, for MATH1102 or MATH1113, titles like "Algebra and Trigonometry" or "Precalculus". Some are in the university library (mostly near QA154). Also for those with valid MSVU student id's, there are books for the Math Placement Test on 7-day reserve. Ask at the circulation desk, under course MATH 001 for College Algebra texts, and MATH 000 for Algebra and Trigonometry texts. These reserve books have specific topic references pasted inside the front cover. MATH1102 PREREQUISITE QUESTIONS A. Polynomial Expressions 1) Evaluate 4x2 y - 3xy2 for x = -2, y = 3. 2) Simplify (5ab-4b)-(3ab+2a-6b). 3) Multiply (6x-2)(x2-3x+5). B. Linear Equations in One Variable 4) Solve and check: 4(3x+5) = -5(x+13). 5) Jo has 23 coins. She has twice as many nickels as pennies and three more dimes than pennies. How many of each type of coin does she have? 6) Solve and check: 0.07x + 0.09(x+200) = 66. 7) The width of a rectangle is two centimetres more than one quarter of its length. The perimeter is 34 centimetres. Find the dimensions. 8) Solve: 3-2x < x+9. C. Equations of Lines 9) Graph the linear equation 4x - 5y = 10. 10) Find the slope of the line through (-5,2) and (6,-1). 11) Give the equation in standard form ax+by=c of the line through the points (2,-1) and (4,6). 12) Give the equation in standard form ax+by=c of the line with slope -5/6 and y-intercept 4. D. Systems of Equations in Two Variables 13) Solve by graphing: 14) Solve by elimination: 15) Solve by substitution: x - y = 8 5x + 3y = 10 6x - y = 9 3x + 2y = 9 6x + 4y = 15 y = 3x - 7 16) Alice spent 6 minutes on each factoring problem and 3 minutes on each evaluation problem. She spent a total of 42 minutes on 9 problems. How much time did she spend on factoring? E. Factorization: for questions 17-24, factor the expression completely. 17) Factor 15a2b3c - 45ab3c2 + 9b4c3 18) Factor 6x2 - 12x + xy - 2y 2 6 4 19) Factor a b - 49c 20) Factor 27s3 - t6 2 21) Factor t - 10t + 24. 22) Factor 2x2 + x - 10. 4 2 23) Factor x + 3x - 18 24) Factor 36x3 + 6x2 - 12x F. Quadratic Equations 25) Solve by factoring: 2x2 - 31x = 16. 26) Solve by any method: x(x-3) = 10. 27) One side of a right-angled triangle is 4 cm less than the hypotenuse and the other is 2 cm less than the hypotenuse. Find the lengths of all sides. 28) Solve using the quadratic formula: 2(x2-3x) = 5 G. Rational Expressions: for questions 29-33, simplify the expression. 29 (a) (b) 30 (b) 31 (a) 32 33 H. Square Roots 34) Evaluate 35) Simplify (a) (a) (b) (b) (c) (c) (d) (where a,b $ 0) Answers to MATH1102 Prerequisite Questions 1) 102 2) 2ab+2b-2a 3) 6x3 -20x2 +36x-10 4) x = -5 5) 5 pennies, 10 nickels, 8 dimes 6) x = 300 7) 12cm x 5 cm 8) x > -2 or (-2,4 ) 9) Intercepts at (0,-2) (2 1/2, 0) 10) -3/11 11) 7x-2y=16 12) 5x+6y=24 13) (5,-3) 14) (-5/2,15/2) 15) (2/3,-5) 16) 30 minutes (5 problems) 17) 3b3c(5a2-15ac+3bc2) 18) (x-2)(6x+y) 19) (ab3 -7c2 )(ab3 +7c2 ) 20) (3s-t2 )(9s2 +3st2 +t4 ) 21) (t-6)(t-4) 2 22) (2x+5)(x-2) 23) (x -3)(x2+6) 24) 6x(3x+2)(2x-1) 25) x = -1/2, 16 26) x = 5, -2 27) 6 cm, 8 cm, 10 cm 28) (3±% 19)/2 29) (a) 7x2 / 9y (b) -2x / x+1 30) 4(x+8) / x(x-6)(x+2) 31) (a) t / t+6 (b) x+4 / 5x-1 32) 4 / x-2 33) 2(9-x) / 8+9x 34(a) 9 (b) -5 (c) not a real number (d) 4 35(a) 3% 5 (b) % 6/3 (c) 5a3 b5 % 2 MATH1113 PREREQUISITE QUESTIONS A. Functions 1) f(x) = 3x2 +8 Find (a) f(-2) (b) 2) f(x) = Find the domain. 3) For children between ages 6 and 10, height y (in cm) is frequently a linear function of age t (in years). The height of a certain child is 122 cm at age 6 and 128 cm at age 7. Express y as a function of t. 4) For f(x) = 3x and g(x) = 2x2-5x find (a) (fB g)(x) (b) (gB f)(x) 5) f(x) = 3x + 5 Find the inverse function f-1 . 6) f(x) = x+4 if x # -1 Find f(-2), f(5) and f(-1). 9 x2 if x > -1 7) For f(x) = * 2x+7* - 4 solve f(x) = 11 B. Quadratic Functions 8) f(x) = 3x2 -6x+2 Find the vertex and intercepts and sketch the graph. 9) A library is suffering from overcrowding. Surveys have shown that when there are 200 seats in the library, students can study at an average rate of 12 pages per hour, but that for every 25 seats added, the resulting distractions slow the average study rate by 1 page per hour. How many seats should the library contain to maximize the total number of pages studied there when all seats are occupied? 10) Solve x2-x $ 12 11) Find the domain of C. Polynomial and Rational Functions 12) Solve (x-1)2 (x+3) > 0 13) f(x) = x3 +x2 -5x+3 Factor f(x) completely. 14) Graph f(x) = (x-1)2 (x+3) 15) Solve 16) For find all intercepts and asymptotes, then sketch the graph. D. Exponents and Radicals 17) Simplify (a) (5x2 y-3 )(4x-5 y4 ) (b) (27a6 )-2/3 18) Rationalize the denominator: 19) Factor and simplify 20) Solve 21) (3x+1)6 (1/2)(2x-5)-1/2 (2) + (2x-5)1/2 (6)(3x+1)5 (3) Find the inverse function. 22) Sketch the graph of E. Conic Sections 23) Find the distance between points P1 = (-2,5) and P2 = (3,4) 24) Graph x2 +y2 +2y = 4x+4 25) Graph 4x2+9y2-32x-36y+64 = 0 F. Exponential and Logarithmic Functions 26) Solve the equation 4x-3 = 84-x 27) Sketch the graph of f(x) = 3x-1 28) The number of bacteria in a certain culture grows exponentially, so that the number f(t) of bacteria t hours after noon is given by f(t)=500e0.5t . Estimate the number of bacteria at 3 p.m. 29) Evaluate where possible a) log5 25 b) log2 % 8 c) log10 0 d) ln(e-3) 30) Simplify a) 2loga 5 + loga 20 - loga 100 b) (loga 9)2 + (loga 2)2 31) Solve to 2 decimal places a) 10x = 25 b) log2 x = 0.5 c) logx 40 = 2 32) Approximate to 2 decimal places a) log2 1000 b) log7 6 c) log10 e 33) When a certain drug is taken orally, the amount A (in milligrams) present in the bloodstream after t minutes is predicted to be A = 100(1 - 0.9t ), for 0# t# 10. How long will it be before 25 milligrams of the drug has entered the bloodstream? 34) Solve log2 x + log2 (x+2) = 3 35) Find the inverse of f(x) = 2ln(x)-7 36) Find the domain of f(x) = log(x2 -2x) 37) Find the inverse of G. Trigonometry 38) Find the exact radian measure of (a) 120° (b) -45° (c) 450° 39) Find sint, cost, and tant for (a) 3B /2 (b) -B (c) 9B /4 40) Find the values of all six trigonometric functions given that cost = -1/4 and tant > 0. 41) Verify the identity cos2t (sec2t - 1) = sin2t 42) Find sin2 , cos2 and tan2 for the angle 2 in standard position with the point P(-2,1) on its terminal side. 43) A right triangle has an angle 2 , a hypotenuse of 7, and the side opposite to 2 of 4. Find sin2 , cos2 and tan2 . 44) Find the exact value of a) sin(2B /3) b) cos(-5B/4) 45) Approximate, to the nearest 0.01 radian, all angles 2 in the interval [0,2B ) that satisfy the equation sin 2 = 0.333. 46) Find the amplitude, the period and the phase shift and sketch the graph of f(x) = 1.5 sin (3x + B ). 47) Find all solutions of cot 2 = % 3 48) Find all solutions in the interval [0,2B ) of tan2 x sinx = sinx 49) Find the exact value of sin(3B /8) using the half-angle formula. 50) Given " and $ are second quadrant angles with sin" = 3/5 and tan$ = -2, find sin(" +$ ). 51) Verify the identity cos(" -$ ) - cos(" +$ ) = 2sin" sin$ 52) A rocket is fired at sea level and climbs at a constant angle of 80° for a distance of 5000 metres. Find its altitude to the nearest metre. 53) Given triangle ABC with p BAC = 38°, p ABC = 12° and side AC of length 112, use the law of sines to approximate the length of side AB. 54) Given triangle ABC with p ACB = 57°, lengths of side BC = 23.5 and side AC = 40.0, use the law of cosines to approximate the length of side AB. Answers to MATH1113 Prerequisite Questions 1(a) 20 (b) 6a+3h 2)[1/3,4 ) 3) y = 6t + 86. 4) f(g(x)=6x2 -15x g(f(x))=18x2 -15x 5) f-1 (x)=(x-5)/3 6) f(-2)=2 f(5)=25 f(-1)=3 7) x= 4 or -11 8) Vertex at (1,-1) Zeros (6±% 12)/6. 1.58,0.42 Graph is a parabola, opening upwards, y-intercept 2. 9) 250 seats (which maximizes studying at 2500 pages). 10) (-4 ,-3]c [4,4 ) 11) (-4 ,1]c [2,4 ) 12) (-3,1)c (1,4 ) 13) (x-1)2 (x+3) 14) Cubic polynomial, zeros at -3,1; y-intercept 3. 15) (-4 ,-1/2]c (3,4 ) 16) f(x)=(2x+1)/(x+3) with a hole at x=2 (2,1). x-intercept x=-1/2 vert.asymptote x=-3 f(0)=1/3 horizontal asymptote y=2 17(a)20y/x3 (b)1/9a4 18)(t+10% t+25)/(t-25) 19) (3x+1)5 (39x-89)/(2x-5)1/2 20) 4 21) f-1(x)=(x-1)2+2(x$ 1) 22)graph of f(x)=% x (half-parabola) shifted right 2 and up 1 23)% 26 24) Circle with centre (2,-1), radius 3 25) Ellipse centre(4,2) a=3 b=2 26) x=18/5. 27) The graph of 3x shifted 1 unit to the right (through (1/3,0), (1,1) and (2,3)). 28) about 2200 bacteria 29a)2 b)3/2 c)undefined d)-3 30a) loga 5 b) cannot be simplified 31a) 1.40 b) 1.41 c) 6.32 32a)9.97 b) 0.92 c) 0.43 33) about 2.7 minutes. 34) 2 35) f-1(x)=e(x+7)/2 -1 36) (-4 ,0)c(2,4 ) 37) f (x)=log2 (1+3/x) 38a) 2B /3 b) -B /4 c) 5B /2 39 a)sint=-1 cost=0 tant is undefined b)sint=0 cost=-1 tant=0 c)sint=% 2/2 cost=% 2/2 tant=1 40) sint=-% 15/4 tant=% 15 csct=-4/% 15 sect=-4 cott=1/% 15 41)cos2 t (sec2 t - 1) = cos2 t(tan2 t)=cos2 t(sint/cost)2 =cos2 tsin2 t/cos2 t=sin2 t 42) sin2 =1/% 5 cos2 =-2/% 5 tan2 =-1/2 43) sin2 =4/7 cos2 =% 33/7 tan2 =4/% 33 44a) % 3/2 b) -% 2/2 45)0.34, 2.80 46)Amplitude 1.5 Period 2B /3 Phase shift -B /3 One cycle between -B /3 and B /3 47) B /6+2B n, for all integers n. 48) 0, B , B /4, 3B /4, 5B /4, 7B /4 49) % (2+% 2)/2 50) -11 / 5% 5 51) cos(" -$)-cos(" +$ )=cos" cos$ +sin" sin$ -(cos" cos$ -sin" sin$ )=cos" cos$ + sin" sin$ cos" cos$ +sin" sin$ =2sin" sin$ 52) 4924 metres 53) 413 54) 33.6