# Taking a derivative

• Sep 9th 2008, 06:42 AM
yellowrose
Taking a derivative
I was wondering what the rule was about three different equations multiplied together. I know how to use the chain rule using 2 equations multiplied together, but was wondering what to do with 3.

Thanks!
• Sep 9th 2008, 06:48 AM
Chop Suey
I think you might be referring to the product rule.

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

$(f(x)g(x)h(x))' = f'(x)g(x)h(x) + f(x)g'(x)h(x) + f(x)g(x)h'(x)$

Do you see the pattern here?