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Math Help - Derivative

  1. #1
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    Derivative

    If
    determine .

    it gives me (pi5)(7t^6) but i dont think its the right answer
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  2. #2
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    Quote Originally Posted by wannous View Post
    If
    determine .
    f(t) = \sqrt{5} \cdot t^{-7}

    f'(t) = -7\sqrt{5} \cdot t^{-8} = -\frac{7\sqrt{5}}{t^8}
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  3. #3
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    aww thank i forgot it becomes negative
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