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Math Help - exponent confusion

  1. #1
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    exponent confusion

    say i have a function  (-a)^{x+1} , does this mean the exponent part of the function is a negative also? e.g. bring the +1 part of (x+1) down so,
     (-a) (-a)^x or-is-it (a)(-a)^x

    another e.g.  (-1)^{x+1} = (-1)(-1)^x or-is-it (1)(-1)^x
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  2. #2
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    Quote Originally Posted by purebladeknight View Post
    say i have a function  (-a)^{x+1} , does this mean the exponent part of the function is a negative also? e.g. bring the +1 part of (x+1) down so,
     (-a) (-a)^x or-is-it (a)(-a)^x

    another e.g.  (-1)^{x+1} = (-1)(-1)^x or-is-it (1)(-1)^x
    Very good question. The answer is the first case you wrote.

    Consider the substitution u=-a. Now look at u^{x+1}=(u^x)(u). Now plug back in -a for u and you get the desired relation.
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