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Math Help - Help with an exponent

  1. #1
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    Help with an exponent

    Im almost done but im stuck with the exponent, im trying to solve for r: A/B=r^(1-n).
    How do i get the exponent on the other side? Thank you.
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  2. #2
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    Quote Originally Posted by cowboys111 View Post
    Im almost done but im stuck with the exponent, im trying to solve for r: A/B=r^(1-n).
    How do i get the exponent on the other side? Thank you.
    You have to calculate an exponent (= logarithm). Probably you now know how to do this question:

    r^{n-1} = \dfrac AB~\implies~ n-1 = \log_r\left(\dfrac AB \right)

    I'll leave the rest for you.
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