Question

(tolong jawab, pke cara)
Dik F(x) = ax+b
F(-2) = 17
F(5) = -32
Tentukan f(12)

Answer 1

-2a + b = 17
5a + b = -32
------------------ - (dikurangi)
-7a = 49
a = -7

-2a + b = 17
-2 (-7) + b = 17
14 + b = 17
b = 3

f(12) = -7 x 12 + 2
= -82

Answer 2

F(x) = ax + b
f(-2) = -2a + b = 17
f(5) = 5a + b = -32
         -7a       = 49
             a      = -7

-2a + b = 17
-2(-7) + b = 17
14 + b = 17
b = 3

maka :

f (12) = 12a + b
          = 12 (-7) + 3 = -81