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29 October, 08:55

For the function f (x) = x^2-12 find (f^-1) (4)

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  1. 29 October, 11:23
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    F (x) = x^2 - 12

    y = x^2 - 12

    y + 12 = x^2

    x = sqrt (y + 12)

    (f^-1) (x) = sqrt (x + 12)

    (f^-1) (4) = sqrt (4 + 12) = sqrt (16) = 4

    (f^-1) (4) = 4
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