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Math Help - A derivative question...

  1. #1
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    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!
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  2. #2
    Super Member Aryth's Avatar
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    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))
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  3. #3
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    Yeah that was right. Just wasn't simplified enough. Thanks so much!
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  4. #4
    Super Member General's Avatar
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    Quote Originally Posted by fleabass123 View Post
    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?
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