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Math Help - Exponential and logarithmic functions

  1. #1
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    Question Exponential and logarithmic functions

    The poi nt P(-1,1/3) lies on the graph of the exponential function f(x) = bx, then b =

    I need the steps please or What I should know before I see an exercise like this in a exam!!
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  2. #2
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    Re: Exponential and logarithmic functions

    You are told that y= b^x, and that when x= -1, y= 1/3. That is, b^{-1}= 1/3. Now, do you know what "-1 power" means?
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  3. #3
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    Re: Exponential and logarithmic functions

    a​-n = 1/an
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