Average Cost for Producing CDs

Question

c(x)=c(x)/x

Using this definition to find the average cost function C

 for the given total cost function C(x) = 2,300 + 6x − 0.0006x²

 over the specified domain gives the following result.

=

Answer 1

c(x) = c(x)/x does not make sense. Do you mean c/cx? The derivative of c with respect to x?