#### opus

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**1. The problem statement, all variables and given/known data**

Find the derivative of ##f(x)=\frac{e^x-e^{-x}}{e^x+e^{-x}}##

2. Relevant equations

2. Relevant equations

**3. The attempt at a solution**

Please see attached image. The given solution has a 4 in the numerator, and I don't see how I can come across that with the way that I'm going. I think I'm making it 100x more difficult than it should be done. Any tips on what I can do to go at this more efficiently?