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10 December, 15:27

F (x) = 2x+7 g (x) = 7-x

what is

fog

gof

gog

+2
Answers (1)
  1. 10 December, 15:38
    0
    If f (x) = 2x + 7 & g (x) = 7 - x

    then:

    fog = 2 (7 - x) + 7

    = 14 - 2x + 7

    = 21 - 2x

    gof = 7 - (2x + 7)

    = 7 - 2x - 7

    = - 2x

    gog = 7 - (7 - x)

    = 7 - 7 + x

    = x
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