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5 May, 10:33

F (x) = √ (10-3x) find the formula

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  1. 5 May, 10:46
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    Let y=f (x)

    y=sqrt (10-3x)

    you want to make x the subject

    square both sides

    y²=10-3x

    3x=10-y²

    x = (10-y²) / 3

    now replace y with x

    f^-1 (x) = (10-x²) / 3
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