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20 January, 18:00

If f (x) = 3x, what is f^-1 (x) ?

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Answers (2)
  1. 20 January, 19:13
    0
    Answer: f-1 (x) = x/3 + 5/3

    Step-by-step explanation: The inverse function is found by replacing the independent variable with the dependent variable and vice versa like so

    f (x) = 3x-5 becomes x = 3y-5; now we solve for y

    3y = x + 5 or y = x/3 + 5/3

    Therefore the inverse function becomes: f-1 (x) = x/3 + 5/3
  2. 20 January, 21:44
    0
    Answer: - 1 (x) ] = x
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