Question

dadas as funções f e g reais, definidas por f(x)=2x -3 e g(x)=2x + k sabendo que f(g(x)) = 2.

Answer 1

f(g)=2
f=2x-3
g=2x-k

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

k= 2x+1/2