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27 January, 19:19

Which function is the inverse of f (x) = - 5x-42

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  1. 27 January, 19:26
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    f' (x) = - (x+42) / 5

    Step-by-step explanation:

    Rewrite f (x) as y:

    y=-5x-42

    Flip x and y and solve for y:

    x=-5y-42

    x+42=-5y

    (x+42) / -5=y

    So the inverse function is f' (x) = - (x+42) / 5 (note that f' means inverse)
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