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27 June, 11:30

Which expression represents the composition [g o f o h] (x) for the functions below?

f (x) = 5x - 4

g (x) = 5x3

h (x) = 3x

5 (15x - 4) 3

(75x - 20) 3

5 (5x - 4) 3

675x3 - 4

+3
Answers (1)
  1. 27 June, 12:05
    0
    First plug h into g (x).

    g (x) = 5x^3

    g (3x) = 5 (3x) ^3

    g (3x) = 5*27x^3

    g (3x) = 135x^3

    Now plug 135x^3 into the f function.

    5 (135x^3) - 4

    675x^3 - 4

    The last one is correct.
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