# studyques3 - ECON 331 Tutorial Questions#3 SHORT ANSWER...

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ECON 331 Tutorial Questions #3 SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 1) Find y' if y = ( x 3 - 10 x + 2)( x 2 + 7 x + 1). 1) 2) Find y' if y = 2 x + 3 7 - 5 x . 2) 3) Find y' if y = x 2 + 1. 2 x 3 - 1 .3 ) 4) Find the slope of the curve y = 2 x + 5 x - 3 at the point (4, 13). 4) 5) The average cost c of producing q units of a product is given by c = 4 q q + 2 + 10,000 q . Find the marginal cost function. 5) 6) For the consumption function C = 10 + 5 8 I - I 2 , (a) find the marginal propensity to consume when I = 16; (b) find the marginal propensity to save with I = 16. 6) 7) If y = 4 u 2 - 13 u + 3 and u = 7 x 3 + 5 x 2 + 4 x -14, then by direct use of the chain rule find dy dx and evaluate when x = 1. 7) 8) If y = (6 u 2 - 7) 3 and u = (9 - 2 x ) 5 , then by direct use of the chain rule find dy dx and evaluate when x = 5. 8) 9) Find y' if y = 5(2 x 2 - 3 x + 4) 8 .9 ) 10) Find y' if y = x + 2 x - 3 4 . 10) 11) The demand function for a manufacturer's product is given by p = 300 - q 2 , where p is the price per unit when q units are demanded.

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studyques3 - ECON 331 Tutorial Questions#3 SHORT ANSWER...

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