AP ECON 1540 Sample Midterm Exam
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AP ECON 1540 Sample Midterm Exam
Questions:
1. Suppose that output is produced according to Q = 4LK, the price of K is $10, and the price of L is $5. Answer the following.
a. What is the cost minimizing combination of K and L capable of producing 2 units of output?
b. What is the maximum possible output when the total cost is limited to $100?
Ans: L = 1 and K = 0.50.
2. Complete the following implications:
a. z = (x y2 4 + 2)5 = x
b. F(K, L) = ( + 2 = K
3. Find all the first- and second-order partial derivatives of the followings:
a. z = y ln x
b. z = xy 2 − exy
4. Find the partial elasticities of z with respect to x and y in the following cases:
a. z = xnexyney
b. z = x2y 5
5. Find dz / dt of the followings:
a. z = x ln y + y ln x, x = t + 1 , y = ln t
b. z = ln x + ln y , x = Ae at , y = Bebt
6. y is defined implicitly as a function of x . Find dy / dx .
a. x3y 2 − 2xy + 5 = 0
b. x(x − y) − 4y3 = 2exy + 6
7. Given a Cobb-Douglas production function, Q = AK L , prove that the elasticity of substitution between the two inputs, K and L, is unitary, i.e., KL = 1 .
8. Determine the level of homogeneity for each of the following production functions.
a. Q =
b. Q = 0.9K 0.2L0.8
9. Suppose the following utility function: U(x, y) = xy + y .
a. Find MRS, the marginal rate of substitution, between y and x.
b. What is the elasticity of substitution between y and x?
2022-03-15