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Help please!

- Thread starter firegoalie33
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Help please!

- #2

Office_Shredder

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Can you find f'(3x^{4})?

- #3

HallsofIvy

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[tex]\frac{df(3x^4)}{dx}= f'(3x^4)(12x^3)[/tex]

So you must have [itex]f'(3x^4)(12x^3)= 6x^4[/itex].

That lets you find [itex]f'(3x^4)[/itex] per Office Shredder's question. Now, if you let [itex]u= 3x^4[/itex], you can find f'(u).

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