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12 February, 01:26

If (x) = 2x+10, then f^-1 (x)

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  1. 12 February, 05:01
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    If f (x) = 2x + 10, then x = 2 (f^-1 (x)) + 10

    [swap f (x) for x and x for f^-1 (x) ]

    Rearrange:

    2 (f^-1 (x)) = x - 10

    f^-1 (x) = (x - 10) / 2
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