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30 June, 19:03

Let f (x) = x + 8 and g (x) = x2 - 6x - 7. Find f (g (2)).

Select one:

a. - 7

b. - 3

c. 10

d. 33

+3
Answers (2)
  1. 30 June, 19:08
    0
    The answer is a. - 7

    1. Find g (2).

    2. Find f (g (2)).

    1. g (x) = x² - 6x - 7

    x = 2 ⇒ g (2) = ?

    g (2) = 2² - 6·2 - 7 = 4 - 12 - 7 = - 15

    2. f (x) = x + 8

    g (2) = - 15

    f (g (2)) = f (-15) = - 15 + 8 = - 7
  2. 30 June, 19:26
    0
    g (2) = (2) ^2 - 6 (2) - 7

    = 4 - 12 - 7

    = - 15

    f (g (2)) = - 15 + 8

    = - 7
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