Reference no: EM13347676
Problem 1. Solve the following functions for x (where x is a real number). Leave your answers in exact form, that is, do not use a calculator, show all working.
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Problem 2. A manager has determined the cost C, in dollars, for manufacturing is
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for manufacturing, where q is the number of units produced in a given day.
(a) What is the cost of manufacturing before any units are produced?
(b) What is the cost of manufacturing if 1980 units are produced in a given day?
(c) How many units would be produced if the cost of manufacturing is $150 in a given day?
Problem 3. Find all solutions of the following equations in the interval [0, 2π)
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Problem 4. (a) Sketch the graph of the circular function
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i. State clearly the amplitude, phase shift, period and the equation of the midline.
ii. Show working for all θ- and y-intercepts for the function y = f(θ).
iii. Show at least two periods for the graph of y = f(θ), and label the axes clearly.
(b) Prove the following identity
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Make sure you show all working and give clear explanations.
Problem 5. Consider the function
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which has the graph
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(a) Explain why f has no inverse function. You should include an example to support your explanation.
(b) Determine the largest possible domain, which includes x = 1, for f(x) such that the inverse function f-1(x) does exist.
(c) Given your answers in (b) ?nd the inverse function f-1(x). Clearly explain key steps and show all working.
(d) Sketch the graph of y = f(x) for the restricted domain in (b) and y = f-1(x) on the same set of axes. All points of intersection and axes-intercepts should be easily determined from your sketch or clearly labelled. Furthermore axes should be clearly labelled with appropriate scaling.