Question

Dada a função f(x) = ax+b...

Answer 1

f(x) = ax +b

$\left \{ {{2 = 0a +b} \atop {0=-2a +b}} \right.$

b = 2

0 = -2a +2

-2/-2 = a

1 = a

f(x) = x +2

f(3) = 3 +2 → 5