Question

Suatu fungsi ditentukan dengan rumus g(x) = ax + b . Jika g(2) = 2 dan g(-3) = -13 , maka nilai g(-5) =....

Answer 1

Verified answer

G(x) = ax + b

g(2) = 2
2a + b = 2

g(-3) = -13
-3a + b = -13

2a + b = 2
-3a + b = -13
-------------------- -
5a = 15
a = 3

2a + b = 2
2(3) + b = 2
6 + b = 2
b = 2 - 6
b = -4

g(x) = 3x - 4

g(-5)
= 3(-5) - 4
= -15 - 4
= -19

Answer 2

G(x) = ax + b
g(2) = 2a + b
2 = 2a + b

g(-3) = -3a + b
-13 = -3a + b

Dengan menggunakan eliminasi, maka didapatkan a=3, dan b=-4

g(-5) = -5a + b
= -5(3) + (-4)
= -19