Foundation Program Mathematics C SAMPLE B
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Foundation Program
SAMPLE B
Mathematics C
Final Term 1 Examination
Question 1 (12 marks) Use a SEPARATE book clearly marked Question 1
(i) For the polynomial 6x5 3x2 7x 5 state:
(a) the degree.
(b) the coefficient of x2 .
(ii) Evaluate 83 .
(iii) For the universal set U and sets A and B it is given that
n(U) 25, n(A) 12, n(B) 10, and n((A B)) 5 .
(a) Find n(A) .
(b) Find n(A B) .
(iv) Factorise 4x2 4x 3 .
(v) Use the remainder theorem to find the remainder when 2x4 x3 4x 7 is divided by x 2 .
(vi) Find the solution set for x when 1 2x 1 3 .
(vii) Find the natural domain (greatest possible domain) of y .
(viii) (a) Simplify .
(b) Hence, or otherwise, sketch the graph of y x2 4 .
Question 2 (12 marks) Use a SEPARATE book clearly marked Question 2
(i) Find the 60th term ofthe sequence 3, 10, 17, 24, .
(ii) Find the derivative of x x x .
(iii) Find the gradient ofthe normal to the curve y at the point where x 1 .
(iv) Solve 9x 10 3x 9 0 .
(v)
Diagram not
to scale
In the diagram above y f (x) is drawn. The points A( 1,5) and B(2,1) lie on the
curve.
(a) State the value of f (0) .
(b) If f (3) 0 use the graph to solve f (x) 0 .
(c) Sketch y f (x) .
(d) Find the equation of the line passing through the point A and parallel to the x-axis.
(vi) Determine whether the function f x 2x2 5x is odd, even or neither. (vii) Solve 9 x 5 .
Question 3 (12 marks) Use a SEPARATE book clearly marked Question 3
(i) (a) Find the domain ofthe function f (x) ln (x 1) . (b) Hence sketch the function f (x) ln (x 1) .
(c) Find the equation of f 1(x) the inverse function ofthe function f (x) .
(ii) Find the second derivative of f (x) 3 x2 5 .
(iii) For the function f x x3 2 , find the average rate of change as x changes from 3
to 7 .
2
x3 3 x .
(v) For 2log a m log a n 5 , find a relationship between a, m and n which does not involve logarithms.
(vi) Find the values of x for which the curve y x3 6x2 11x 9 is concave up.
Question 4 (12 marks) Use a SEPARATE book clearly marked Question 4
(i) Find the limiting sum ofthe geometric series 64 24 9 .
(ii) Show that f (x) x3 is an odd function.
(iii) Consider the function f (x) 2x 3 9x2 52 .
(a) Find f (2) .
(b) Find the stationary points and determine their nature.
(c) Find the values of x for which the function f (x) is increasing.
(d) Find any points of inflection. (e) Sketch the graph ofthe function f (x) .
(f) Find the maximum and minimum values ofthe function f (x) on the interval
1 x 2 .
(iv) (a) Find the amount to which $7 000 grows when invested at an annual rate of
8% , compounded quarterly, for 6 years.
(b) Find the effective rate which gives the same annual return as an annual rate of
8% , compounded quarterly.
Question 5 (12 marks) Use a SEPARATE book clearly marked Question 5
(i) A function is defined by:
f x x1
x
for x 1
for x 1
(a) Evaluate f (2) f (2) .
(b) Sketch y f (x) .
(ii) A walnut grower estimates that if he plants 20 walnut trees in a field then each tree
will yield 60 kg of walnuts giving a total yield of 1200 kg but for each additional tree planted in the field the yield per tree will drop by 2 kg.
(a) Write an expression for the total yield ofwalnuts if (20 x) walnut trees are
planted in the field.
(b) Hence find the number of walnut trees planted in the field if the total yield is
to be maximized.
(iii) (a) Express ln x in the form a ln x where a is a constant.
(b) Hence, using the substitution m ln x or otherwise, solve ln x .
(iv) (a) On the same diagram, sketch the graphs of y x 1 and y
clearly marking the x and y intercepts of each graph.
(b) Hence, or otherwise, solve x 1 .
(c) Find the positive value of a such that y x 1 and y meet in one point only.
Question 6 (12 marks) Use a SEPARATE book clearly marked Question 6
(i) A manufacturing company which makes the breakfast cereals Wheaties finds that if they set the price of a box ofWheaties at $C then they will sell 100x boxes per week where C 5 x . Each box ofWheaties costs $1 37 to produce.
(a) Write an expression for the weekly profit P(x) dollars.
(b) How should the cereal be priced in order to maximize weekly profit?
In parts (ii) and (iii) below, the following formulas may be of assistance:
1 in 1
i
1 1 i n
i
(ii) The body coorporate of a block of 12 townhouses wishes to set up a sinking fund to
cover the anticipated expenses involved in painting and maintenance work in 5 years time. Find the quarterly levy required from each owner ifthe funds are invested at an annual rate of 10% compounded quarterly and are to amount to $40 000 in 5 years time.
(iii) A home was purchased for $65000 . The purchaser financed this by paying 20%
deposit, borrowing the balance from a bank and signing a mortgage agreement to repay the loan plus interest over a 25 year period by making equal monthly repayments. Interest is charged at an annual rate of 9% , compounded monthly.
Find:
(a) the amount borrowed.
(b) the monthly repayment.
(c) the amount still owing 14 years after the home was purchased.
(d) the purchaser’s equity in the home 14 years after purchase ifthe market value of the home had by then increased to $100 000 [Answer to the nearest dollar].
2022-03-07