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31 December, 13:38

Write the inverse of the rational function f (x) = 15x + 50 over x+5

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  1. 31 December, 15:21
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    F (x) = 15x + 50/x + 5

    y = 15x + 50/x + 5

    x = 15y + 50/y + 5

    x (y + 5) = 15y + 50

    xy + 5x = 15y + 50

    5x - 50 = 15y - xy

    5x - 50 = y (15 - x)

    y = 5x - 50/15 - x

    SO

    The inverse of f (x) = 5x - 50 over 15 - x
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