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f(2) = 11, jadi f(2) = 2m+n = 11
Gunakan spldv!
-m + n = 2
n = 2 + m
2m +n = 11
2m + (2+m) = 11
3m +2 = 11
3m = 9
m = 3
n = 2+m
n= 2+3 = 5
jadi f(4)= m.4+n = 3.4+5 = 17