Fungsi W : R ---> R ditentukan oleh W(x) = a + b , a dan b bilangan bulat. Jika W(0) = 5 dan W (-7) = -9.Tentukan nilai x agar W(x) = -107 Tlg bgtt yaa soalnya

W (x) = ax + b.
W (0) = 5, maka a.0 + b = 5, maka b = 5
W (-7) = -9 maka a. -7 + b = -9
-7a + 5 = -9
-7a = -9 - 5
-7a = -14
a = -14/-7
a = 2. Jadi W(x) = 2x + 5.
W(x) = -107, artinya 2x + 5 = -107
2x = -107 - 5
2x = -112
x = -112/2
x = -56, Jadi x = -56