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Math Help - derivative question

  1. #1
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    derivative question

    f(t) = \frac{pqe^t}{(1-qe^t)^2}

    \frac{d}{dt}f(t) = \frac{(pqte^t)(1-qe^t)^2 -2(1-qe^t)(-tqe^t)(pqe^t)}{(1-qe^t)^4} = \frac{[(pqte^t)(1-qe^t)][(1-qe^t)+2(pqe^t)]}{(1-qe^t)^4}

    is this right?
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  2. #2
    Behold, the power of SARDINES!
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    in your first derivative

    pqe^t the derivative is pqe^t

    remember \frac{d}{dx}e^t=e^t not te^t

    Good luck.
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  3. #3
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    Thanks, I don't know how I forget about deriving e.
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