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1 May, 21:30

For the function f (x) = (7-8x) ^2 find f^-1. Determine whether f^-1 is a function.

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  1. 1 May, 21:57
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    F^-1 (x) = d [ (7 - 8x) ^2]/dx

    = {d [ (7 - 8x) ^2] / dx}{d (7-8x) / d (7-8x) }

    = {d [ (7 - 8x) ^2] / d (7-8x) }{d (7-8x) / dx}

    = {2 (7 - 8x) }{-8} = - 16 (7 - x)
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