Jika f(x+2)=2x+1, maka nilai f(3)= .....

f (x+2) = 2x + 1
maka
f (x) = 2x - 1
f (3) = 2(3) - 1

= 6 - 1
= 5

Bab Fungsi
Matematika SMP Kelas VIII

f(x + 2) = 2x + 1

x + 2 = 3
x = 3 - 2
x = 1

2x + 1 = 2 . 1 + 1 = 3