nilai f(1)+f(2) untuk f(x) =3x+1 adalah?

F (1) = 3 (1) + 1 = 4
F (2) = 3 (2) + 1 = 7
F (1) + F (2) = 4 + 7 = 11

Dik : F(x) = 3x+1
Dit : f(1)+f(2)...?
Jawab :
F(1) = 3.1+1
=3+1
=4
F(2) = 3.2+1
=6+1
=7
F(1) + f(2) = 4 + 7 = 11