Is This correct?

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- June 5th 2009, 08:29 AMMaths_noobDifferentiate using product Rule
Is This correct?

- June 5th 2009, 08:37 AMjosipive
yes

( f( x )*g( x ) ) ' = f ' ( x )*g( x ) + g ' ( x )*f( x )

you can put:

if f( x ) = ( x + 20 )^4 => f ' ( x ) = 4*( x + 20 )^3

g( x ) = ( x - 30 )^3 => g ' ( x ) = 3*( x - 30 )^2

and if I use that in the formula above i will get the same thing as you - June 5th 2009, 08:37 AMe^(i*pi)
- June 5th 2009, 08:40 AMMaths_noob
Nectar thats lovely jubbly then :)

Finaly! I know how to use the product rule