Here are some sample solutions to selected exercises in Kreps: A Course in Microeconomic Theory:

The consumer has income I = 100 and faces prices px = 2 and py = 1.

| | b1 | b2 | | --- | --- | --- | | a1 | 2, 3 | 1, 2 | | a2 | 3, 1 | 2, 2 |

:

Suppose that a consumer has preferences over two goods, x and y, represented by the utility function: