garykellygroup
garykellygroup garykellygroup
  • 16-03-2017
  • Mathematics
contestada

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

what is
fog
gof
gog

Respuesta :

JoshEast
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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