# Formula of a derivative problem

• March 10th 2010, 02:00 PM
ascendancy523
Formula of a derivative problem
So here's my problem:

Given that $\frac{d}{dx}(f(2x^3))=7x^4$, find a formula for the derivative of f.

Would I solve using the chain rule?
• March 10th 2010, 02:01 PM
Miss
Quote:

Originally Posted by ascendancy523
So here's my problem:

Given that $\frac{d}{dx}(f(2x^3))=7x^4$, find a formula for the derivative of f.

Would I solve using the chain rule?

Substitute $u=2x^3$.