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27 September, 11:09

Let f (x) = x2 - 81. Find f-1 (x)

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  1. 27 September, 12:31
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    This equation states that x equals - 1. So you plug in - 1 to all the x's and solve.

    So, your equation would be f (-1) = (-1) (2) - 81

    So, f (-1) = - 2 - 81

    Then, this means that f (-1) = - 83

    So ...

    f (-1) is equal to - 83
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