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11 July, 13:17

If f (x) = x3 and g (x) = 2x + 7, what is

(fºg) (x) when x = - 2?

+4
Answers (1)
  1. 11 July, 14:33
    0
    9

    Step-by-step explanation:

    f (x) = 3x

    g (x) = 2x + 7

    f (g (x))

    x = - 2

    g (-2) = 2x+7

    2x + 7

    2 * (-2) + 7

    3

    g (x) = 3

    f (g (x))

    f (3)

    f (x) = 3x

    3x

    3*3

    9
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