Question

F(x)=2x+1 e f(g(x) )=2x+3 qual e o valor de g(x)

Answer 1

f(x)=2x+1 e f(g(x) )=2x+3
g(x)=?

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

f(g(x))=f(g(x))

2(g(x))+1=2x+3
2(g(x))=2x+3-1
2(g(x))=2x+2
g(x)=(2x+2)/2
g(x)=x+1