# Differentiation

• Feb 20th 2009, 03:49 AM
kelly00006
Differentiation
Find f(x) for:

a) F(x)= (8-x^4) all divided by x
• Feb 20th 2009, 04:25 AM
HallsofIvy
Either write it as $\frac{8- x^4}{x}$ and use the quotient rule, or write it as $(8- x^4)x^{-1}$ and use the product rule or divide it out to get $8x^{-1}- x^3$.

Do you know the derivative of $x^n$?