a. -6

Penjelasan dengan langkah-langkah:

mencari nilai a Dan :

f(x) = ax +

f(-3) = -3a + b = -15

f(3) = 3a + = 9 –

-6a = -24

a = 4

3(4) + b = 9

12 + b = 9

b = 9 – 12

= –3

maka rumus fungsi f : x => f(x) = 4x – 3

nilai dari f(-2) + f(2) = ….

f(x) = 4x – 3

f(-2) = 4(-2) – 3 = -8 – 3 = –11

f(2) = 4(2) – 3 = 8 – 3 = 5

jadi, nilai f(–2) + f(2) = –11 + 5 = –6