# Math Help - If f(x) = 3arctan(2 e^x), find f'( x ).

1. ## If f(x) = 3arctan(2 e^x), find f'( x ).

Question: If , find .

My work is attached. What am I doing wrong?

Any help would be greatly appreciated!

2. Originally Posted by s3a
Question: If , find .

My work is attached. What am I doing wrong?

Any help would be greatly appreciated!
Looks like you forgot to square the 2.

$(2e^x)^2=4e^{2x}$

By the way, as a friendly piece of advice, most people don't like to open attached files, so if you could find another method of communication (LaTeX), this would bring about quicker replies for you.

http://www.mathhelpforum.com/math-he...-tutorial.html