Question

Fungsi f ditentukan oleh f(x)= ax+b. Jika bayangan -3 adalah -15 dan bayangan 3 adalah 9 tentukan nilai f(-2)+f(2)
Makasiihh

Answer 1

F(x) = ax + b

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

f(3) = 9
f(3) = 3a + b = 9

Lakukan Eliminasi

-3a + b = -15
 3a +b = 9
------------------ +
2b = -6
b = -3

Cari a

3a + b = 9
3a + (-3) = 9
3a - 3 = 9
3a = 12
a = 4

F(x) = ax + b
F(x) = 4x - 3'

F(-2) = 4(-2) - 3
F(-2) = -11

F(2) = 4(2) - 3
F(2) = 5

F(-2) + F(2)
-11 + 5
= -6

#cmiiw