diket:f(x)=2x-1 dan g(x)=x kuadrat+2.tentukan lah (fof)(-2) dan (gog)(1)

jawab

f(x)= 2x - 1
fof(-2) = f { f(-2)} = f {2(-2) -1}  = f {-4 -1 }
fof(-2) = f (-5) = 2(-5) - 1
fof(-2) = -11


gog(1) = g { g(-1)} = g { (-1)²+ 2 } = g {1+2}
gog(1) = g(3) = 3²+ 2= 11
gog(1) = 11