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10 April, 05:07

If f (x) = x^2-1, what is the equation for f^-1 (x)

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  1. 10 April, 05:24
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    Let y = x^2 - 1

    x^2 = y + 1

    x = sqrt (y + 1)

    so f^-1 (x) = sqrt (x + 1) (answer)
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