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Math Help - simple differentiation

  1. #1
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    simple differentiation

    Please help, just can't remember how to do this!

    Differentiate 1/(1-x)
    (w.r.t.x)

    It's for part of a ridiculously hard stats problem, I just can't recall this simple rule!

    Thanks
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  2. #2
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    Rewrite it as (1 - x)^{-1} and then use the chain rule...
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  3. #3
    Senior Member bugatti79's Avatar
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    Quote Originally Posted by canger View Post
    Please help, just can't remember how to do this!

    Differentiate 1/(1-x)
    (w.r.t.x)

    It's for part of a ridiculously hard stats problem, I just can't recall this simple rule!

    Thanks
    Use Quotient rule

    \displaystyle \frac{ vu' - uv'}{v^2} where u = 1 and v =(1-x) you should get

    1/(1-x)^2
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  4. #4
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    thank you both

    Ta!
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