CPM Homework Help : CALC Problem 6-8

You might think that $\frac { d } { d x } ( 2 ^ { x } ) = x ( 2 ^ { x - 1 } )$ by the Power Rule. Unfortunately, this is not correct. Why not?

Hint:

The Power Rule applies to functions that have numeric exponents, such as $y = 2^x$ does not fit the pattern. Explain why not.