1. ## A derivative question...

I'm currently stuck on this problem:

I tried using the product rule and got , which is wrong. I'm not sure what to try now. Any help would be appreciated. Thanks!

2. Did you try simplifying it:

Notice that both terms in the derivative share both a $e^t$ and a $sech(t)$ so that you can pull them out to get:

$f'(t) = e^tsech(t)(1 - tanh(t))$

3. Yeah that was right. Just wasn't simplified enough. Thanks so much!

4. Originally Posted by fleabass123
I'm currently stuck on this problem:

I tried using the product rule and got , which is wrong. I'm not sure what to try now. Any help would be appreciated. Thanks!

What makes you think its wrong?