fungsi g didefinisikan degn rumus g(x)=qx+r nilai g(2)=-7 dan g(-5)=7 nilai g(4) adalah

-7 = 2q + r
7 = -5q + r -
-14 = 7q
q =-14/7
q = -2

-7 = 2q + r [ *5 semua ] -35 =10q + 5r
7 = -5q + r [*2 semua ] 14 = -10q + 2r +
21 = 3r
r = 21/ 3
r= 7

g(4) = (-2)4 +7
g(4) = -8 + 7
G(4) = -1

g(2) = q.2 + r = -7
=2q + r = -7
g(-5) = q.-5 + r = 7
=-5q + r = 7

2q + r = -7
-5q + r = 7
------------- -
7q = -14
q = -7

g(2) = -7.2 + r = -7
-14 + r = -7
r = -7 + 14
r = 7

nilai fungsi
g(x) = -7x + 7

g(4) = -7.4 + 7
= -28 + 7
= -21

semoga membantu:)