February 24, 2017

Homework Help: Calculus

Posted by Erica on Monday, October 17, 2011 at 4:18am.

F(x) = cos(x) • the integral from 2 to x² + 1 of
e^(u² +5)du

Find F'(x).

When i did this, i got:
-2xsin(x)e^((x²+1)² + 5)

But my teacher got:
-sin(x) • the integral from x² + 1 of e^(u² +5)du + 2xcos(x)e^((x²+1)² + 5)

Do you know why the integral is in his answer? I'm not sure where I went wrong. If you could help, I would greatly appreciate it. Thanks!!

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