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28 March, 16:45

If f (x) = 1/9x-2, what is f-1 (x) ?

a. f-1 (x) = 9x+18

b. f-1 (x) = 1/9x+2

c. f-1 (x) = 9x+2

d. f-1 (x) = - 2x+1/9

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Answers (1)
  1. 28 March, 19:59
    0
    F (x) = 1/9 (x) - 2

    x=1/9 (y) - 2

    x+2=1/9 (y)

    9x+18=1 (y)

    f^-1 (x) = 9x+18

    Hope I didn't mess up for your sake.
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