Question

dada as funções f(x)=2x+1,g(x)=-x+7 determine:
f(g(x))=

g(f(x))=

f(f(x))=

Answer 1

$\boxed{f(g(x))=2(-x+7)+1=-2x-14+1=-2x-13}\\ \\ \boxed{g(f(x))=-(2x+1)+7=-2x-1+7=-2x+6}\\ \\ \boxed{f(f(x))=2(2x+1)+1=4x+2+1=4x+3}$