Question

Fungsi g didefinisikan dengan rumus g(x) = qx + r. Nilai g(2) = -7 dan g(-5) = 7. Nilai g(4) adalah...
Sertakan penjelasan ya... sejelas-jelasnya

Answer 1

G(x) = qx + r
g(2) = -7
2q + r = -7 .......(1)
g(-5) = 7
-5q + r = 7 ........(2)

(1) & (2)
2q + r = -7
-5q + r = 7
------------------  -
7q        = -14
  q        = -2

(1) 2q + r = -7
     -4 + r = -7
            r = -3

g(4) = (-2)(4) + (-3)
       = -8 -3
       = -11

Semoga benar dan bermanfaat :)