Question

seja f(x) = 2x - 1 e g(x)= 3x + 2
a) f o g b) g o f

Answer 1

$f(x)=2x-1 \\g(x)=3x+2\\\boxed{f[g(x)]=2[g(x)]-1=2[3x+2]-1=6x+2-1=6x+1}$
$g[f(x)]=3[f(x)]+2=3[2x-1]+2=6x-3+2=\boxed{6x-1}$