Question

Fungsi g didefinisikan oleh g (x) = px + q jika g (-1) = -8 dan g (2) = 1 maka nilai dari 2p + q =

Answer 1

G(x)=px+q
g(-1)=-p+q=-8 ....... pers 1
g(2)= 2p+q=1 ....... pers 2
 eliminasi pers 1 dan 2
-p+q=-8
2p+q=1
-3p=-9
p=3

-p+q=-8
-3+q=-8
q=-5

2p+q= 6-5=1

Answer 2

G (x) = px + q

g(-1) :
p . -1 + q = -8
-p + q = -8

g(2):
p.2 + q = 1
2p + q = 1

-p + q = -8
2p + q = 1
___________ -
-3p = -9
p = -9/-3
p = 3

-p + q = -8
-3 + q = -8
q = -8 + 3
q = -5

maka,
2p + q = 2.3 + (-5)
= 6 - 5
= 1