# Question: what are the marginal utilities of x1 and x2 given...

###### Question details

What are the marginal utilities of *x _{1}* and

*x*given the following utility functions, then find the MRS:

_{2}U(*x _{1}*,

*x*) = 4

_{2}*x*+ 8

_{1}*x*

_{2}U(*x _{1}*,

*x*) = (

_{2}*x*+ 2)(

_{1}*x*+ 1)

_{2}Example. To find the marginal utility for
*x _{1}*, think about how a 1 unit increase in

*x*, keeping all else constant, will change the amount of utility U. Once you have the marginal utilities for both, you can calculate the MRS.

_{1}