Posted by **Evan** on Tuesday, April 17, 2007 at 4:36pm.

Find the derivative:

y=2e^(x^2+1)^3

i have so far 2(2x)e^(x^2+1)^3

Is this correct? How do I simplify furthere if it is?

Hmmmm.

d/dx (f(x))= d/du(f(u)) du/dx

let u= (x^2+1)^3

y= 2e^u

dy/du= 2e^u

du/dx= 3*(x^2+1)^2 * 2x

so...

dy/dx= dy/du *( du/dx)

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