Question

sabendo que f(3x - 2)= xao qaudrado + 1, determine
f(4)

Answer 1

$f(3x-2)=x^2+1$

o valor de f(4) será quando 
3x-2=4
3x=4+2
3x=6
x= 6/3
x=2 

$f(3x-2)=x^2+1\\\\ f(3*2-2)=2^2+1\\\\f(6-2)=4+1\\\\f(4)=5$