In Problem 8, If a = 2

Multiple Choice

In Problem 8, if a = 2.50, b = 0.60, and c = 1, the marginal products of x₁, x₂, and x₃ (in this order) are

A) increasing, decreasing, and constant.
B) decreasing, increasing, and decreasing.
C) all increasing.
D) all decreasing.
E) all increasing if A > 1.