F(x)=2x+7 g(x)=7-x what is fog gof gog

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asked Nov 12, 2018 210k views

5 votes

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

what is
fog
gof
gog

Mathematics
college

Will Hlas asked

by Will Hlas

7.6k points

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1 Answer

3 votes

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

Saravanan I M answered Nov 18, 2018

by Saravanan I M

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