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Math Help - Differentiate Question

  1. #1
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    Differentiate Question

    Hi
    The question i have is how to find the derivative of the following: 6+ z / z^3 , z not equal to 0.

    I have gone through using chain rule and product rule but still cannot get the correct answer.

    The answer is -18 - 2z / z^4.

    P.S
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  2. #2
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    Quote Originally Posted by Paymemoney View Post
    Hi
    The question i have is how to find the derivative of the following: 6+ z / z^3 , z not equal to 0.

    I have gone through using chain rule and product rule but still cannot get the correct answer.

    The answer is -18 - 2z / z^4.

    P.S
    Do you mean (6+ z)/ z^3, that is, \frac{6 + z}{z^3}?

    Then note: \frac{6 + z}{z^3} = \frac{6}{z^3} + \frac{z}{z^3} = \frac{6}{z^3} + \frac{1}{z^2} = 6 z^{-3} + z^{-2}.

    The quotient rule can also be used.
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  3. #3
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    thanks i've got it now
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