Diketahui suatu fungsi f(x)=½x²+3 nillai dari f(2)+f(4) adalah A. 0 B. 6 C.12 D. 16

Bab Fungsi
Matematika SMP Kelas VIII

f(x) = (1/2) . x² + 3

f(2) = (1/2) . 2² + 3
f(2) = (1/2) . 4 + 3
f(2) = 5

f(4) = (1/2) . 4² + 3
f(4) = (1/2) . 16 + 3
f(4) = 11

f(2) + f(4)
= 5 + 11
= 16