Question

dados f(x)=x+2 e g(x)=2x-1,calcule,f(g(x)),g(f)),f(x)=0,g(0)

Answer 1

f(g(x))=
f(g(x))=(2x-1)+2=2x-1+2=2x+1

g(f(x))=
g(f(x))=2(x+2)-1=2x+4-1=2x+3

f(x)=0
x+2=0
x=0-2
x=-2

g(0)=2.0-1=0-1=-1