Diketahui fungsi f(x) =3x+6, f(2)=a,f(b)= 21.tentukan hasil dari a+b !

f(x) = 3x + 6
f(2) = 3.2 + 6 = a
a = 6+6 = 12

f(b) = 3b + 6 = 21
3b = 21-6 = 15
b = 5

a + b = 12 + 5 = 17

Langsung aja y

f(2) = 3(2) + 6
a = 6 + 6
a = 12

f(b) = 3b + 6
21 - 6 = 3b
15 = 3b
5 = b

a + b = 12 + 5 = 17

Semoga berguna +_+