Suatu funsi dirumuskan f(x)=ax+b.Jika f(3)=-8dan f(-3)=4,maka tentukan rumus fungsinya!

f(x) = ax + b
f(3) = 3a + b = - 8
f(-3) = -3a + b = 4
--------------------------(+)
2b = - 4
b = - 2

3a + b = - 8
3a - 2 = - 8
3a = - 8 + 2
3a = - 6
a = - 2

f(x) = - 2x - 2

Gunakan sistem eliminasi
f(x) = ax + b
f(3) = 3a + b = - 8
f(-3) = -3a + b = 4
_______________(+)
2b = - 4
b = - 2
Kemudian hitung a nya
3a + b = - 8
3a - 2 = - 8
3a = - 8 + 2
3a = - 6
a = - 2
Jadi f(x) nya adalah f(x) = - 2x - 2.

Semoga membantu :))