Question

Fungsi f didefinisikan dengan rumus f(x) = ax + b . jika f(-3) = -15 dan f(2) = 0 , nilai f(-5) adalah...

Answer 1

F(-3)= -3a + b = -15
f(2) = 2a + b =0
--------------------------- -
       -5a = -15
          a = 3

f(-3)= -3.3 + b = -15
        -9 + b = -15
               b = -6
f(-5)=3.-5+(-6)= -21