I have an issue with a problem.
I have the following function...
I'm asked to find and interpret the marginal cost dC/dx at x = 5.
Using implicit differentiation, which isn't really too hard because each variable is already on separate sides of the equation, I came up with the answer of
However, when I plug 5 into the derivative, I get an answer of about 16.18. I should be getting 0.94. Can someone give me a tip on what I've done wrong here?