Question

Tolong dong yang pintar matematika dijawab no 2,4 pake caranya ya!

Answer 1

2.
g(x) = px + q
g(3) = 5 => 5 = 3p + q
g(1) = -3 => -3 = p + q

Gunakan eliminasi:
3p + q = 5
p + q = -3
--------------- -
2p = 8 => p = 4, q = -7

g(x) = px + q = 4x - 7
g(-6) = 4(-6) - 7 = -24 - 7 = -31


4.
f(x) = ax + b
f(-2) = 7 => 7 = -2a + b
f(3) = -3 => -3 = 3a + b

Gunakan eliminasi:
-2a + b = 7
3a + b = -3
---------------- -
-5a = 10 => a = -2, b = 3

bentuk umum f(x) = -2x + 3