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## Homework Statement

## Homework Equations

As seen above in question.

## The Attempt at a Solution

Well, I substituted f(x) into the definition of derivative equation and then multiplied the expression by its conjugate, thus getting the expression in the following form:

f'(a) = lim (a + h)

^{2/3}- a

^{2/3}/ h [(a + h)

^{1/3}+ a

^{1/3}]

..........h→0

Now, from this point on, it's just algebra and I am having trouble manipulating this expression so that I can divide the "h" from the denominator. I know I am supposed to use the "hint" given in the question but how would I incorporate that into finding the answer?

Thanks.