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10 July, 12:28

F (x) = 3x + 9, find f^-1 (x)

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  1. 10 July, 15:35
    0
    y=x-9/3

    Step-by-step explanation:

    f (x) = 3x+9

    let f (x) = y

    y=3x+9

    change position of x & y

    x=3y+9

    rearrange:

    x-9=3y

    y=x-9/3
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