Jika f(x) = mx + n. Jika f(2) =1 dan f(3)=11 hitunglah m dan n

f(2)= 2m + n = 1
f(3)= 3m + n= 11
_____________ -
         -m       = -10
                  m= 10
subsi
2m + n = 1
2(10) + n = 1
20 + n= 1
        n= 1 - 20
        n= -19

Jawab :

f(x) = mx + n
f(2) = m(2) + n
= 2m + n = 1
f(x) = mx + n
f(3) = m(3) + n
= 3m + n = 11

2m + n = 1
3m + n = 11
______________-
-1m = -10
m = -10/-1
m = 10

3m + n = 11
3(10) + n = 11
30 + n = 11
n = 11 - 30
n = -19

Maka = m - n
= 10 -(-19)
= 29