So here's my problem: Given that $\displaystyle \frac{d}{dx}(f(2x^3))=7x^4$, find a formula for the derivative of f. Would I solve using the chain rule?
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Originally Posted by ascendancy523 So here's my problem: Given that $\displaystyle \frac{d}{dx}(f(2x^3))=7x^4$, find a formula for the derivative of f. Would I solve using the chain rule? Substitute $\displaystyle u=2x^3$.
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