Question

Fungsi F didefinisikan dengan rumus F(x) =ax+b. Jika F(3)= -10 dan F(-2) =5,tentukan rumus fungsi f(x)? Mohon bantuannya:)​

Answer 1

Diketahui :
f(x) = ax + b
f(3) = -10
f(-2) = 5

Ditanya :
f(x)?

Jawab :
f(x) = ax + b
f(3) = a(3) + b
-10 = 3a + b

f(x) = ax + b
f(-2) = a(-2) + b
5 = -2a + b

3a + b = -10
-2a + b = 5
_________ -
5a = -15
a = -3

3a + b = -10
3(-3) + b = -10
-9 + b = -10
b = -1

f(x) = ax + b
f(x) = -3x - 1