Question

Fungsi F(x)=ax+b
jika f(-3)=15 dan F(3)=9
tentukan nilai a dan b

Answer 1

F(x) = ax +b
f(-3) = a(-3) +b = 15
       = -3a +b = 15
f(3) = a(3) +b = 9
     = 3a +b = 9
-3a +b = 15
3a +b = 9    +
     2b = 24
     b = 24/2
     b = 12
-3a +b = 15
-3a +12 = 15
-3a = 15 -12
-3a = 3
a = 3/-3
a = -1
Jadi, nilai a = -1 dan b = 12.