# Thread: 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!
$(2e^x)^2=4e^{2x}$