Question

Dada a função f( x+ 2) = 3x - 1 . Determine o valor de f( x + 1 ).

Answer 1

$y = x + 2\\ x = y- 2 \\ f(y) = 3*(y-2)-1 = 3y-7\\ f(y-1) = 3y-3-7 = 3y-10 \\ f(x+1) = 3x+6-10 = 3x-4$