pemetaan dirumuskan dengan f(x) = px - 3. jika f(5) = -1 , maka f(p) = ...

f(x) = px - 3
f(5) = -1
5p - 3 = -1
5p = -1 + 3
5p = 2
p = 2/5

f(x) = px - 3 = 2/5 x - 3

f(p) = f(2/5)

f(2/5) = 2/5(2/5) - 3
         = 4/25 - 3
         = 4/25 - 75/25
         = -71/25

diketahui: f(x)=px-3 ; f(5)=-1
maka:
-1=5p-3
5p=2
p=2/5
sehingga 
f(2/5)= 2/5.2/5-3
         =4/25-75/25=-71/25