Thread: Formula of a derivative problem

1. 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?

2. 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 $u=2x^3$.