garykellygroup garykellygroup

16-03-2017
Mathematics

contestada

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

what is
fog
gof
gog

Respuesta :

JoshEast JoshEast

16-03-2017

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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