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11 July, 10:29

The graph shows the function f (x) = 3^x what is the value of x when f (x) = 9

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Answers (2)
  1. 11 July, 10:36
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    2

    Step-by-step explanation:

    Substituting 9 in for f (x),

    9 = 3ˣ

    The power of 3 that equals 9 is the second power; this means x = 2.
  2. 11 July, 10:52
    0
    replace f (x) for 9

    9 = 3^x

    3^2 (3x3) = 9

    so x must be 2
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