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2 November, 04:43

If f (x) = x3 + 4x and g (x) = - 2x + 1, then f (g (3)) = ?

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Answers (2)
  1. 2 November, 04:54
    0
    Answer:-3

    Step-by-step explanation:

    First find g (3).

    So g (3) = - 2 (3) + 1 so g (3) = - 5

    now plug this value into f (x).

    f (-5) = (-5) 3 + 4 (3) = - 15+12 = - 3
  2. 2 November, 05:11
    0
    - 145

    Step-by-step explanation:

    To evaluate f (g (3)), evaluate g (3) then substitute the result into f (x)

    g (3) = - 2 (3) + 1 = - 6 + 1 = - 5, then

    f ( - 5) = ( - 5) ³ + 4 ( - 5) = - 125 - 20 = - 145
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