Question

Diketahui fungsi f(x) = 3x+10 jika f(-1) = a dan f(b) = -2, nilai a+b adalah...

Answer 1

F(x) = 3x+10

f(-1) = a
a = 3(-1)+10
a = 7

f(b) = -2
-2 = 3b+10
3b = -2-10
3b = -12
b = -4

Jadi, a+b = 7+(-4) = 3