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22 September, 05:28

If f (x) = - 8x+4, then f^-1 (x) = ?

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  1. 22 September, 07:02
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    f (x) = - 8x+4 to find the inverse replace f (x) with y and solve for x

    y = - 8x + 4

    y-4=-8x

    x = - (y-4) / 8

    So you replace now x with f^-1 (x) and y with x to get the answer:

    f^-1 (x) = - (x-4) / 8
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