Differentiate the following function.f(x) = 7x3 - 6 cos(x)

f '(x) =

Attempt:

21x^2 - 6sin(x)

Please help me! thank you! (Rofl)

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- Oct 21st 2009, 07:14 AMmiss.strwDifferentiate the following function
**Differentiate the following function.***f*(*x*) = 7*x*3 - 6 cos(x)

*f '*(x) =

Attempt:

21x^2 - 6sin(x)

Please help me! thank you! (Rofl) - Oct 21st 2009, 07:21 AMmathaddict