Question

Fungsi g dirumuskan dengan g(x) = px + q. jika g(2) = 1 dan g(4) = 5, maka nilai dari g(-6) adalah ....

Answer 1

Verified answer

Kelas 8 Matematika
Bab Fungsi 

g(x) = px + q

g(2) = 2p + q = 1
g(4) = 4p + q = 5

4p + q = 5
2p + q = 1
--------------- -
2p = 4
p = 2

2p + q = 1
2 . 2 + q = 1
q = 1 - 4
q = -3

g(x) = 2x - 3
g(-6) = 2 . (-6) - 3
g(-6) = -12 - 3
g(-6) = -15

Answer 2

G(2)=1
p(2)+q=1
2p+q=1
q=1-2p

g(4)=5
p(4)+q=5
4p+(1-2p) =5
4p+1-2p=5
4p-2p=5-1
2p=4
p=2


berarti q=1-2p
q= 1-2(2)
q=-3

g(6)=px+q
2(6)+(-3)
12-3
9