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f(2) = 3.2 + n = 5
6 + n = 5
n = 5 - 6
-1
maka f(1)
f(1) = 3x - 1
f(1) = 3.1 - 1
= 3 - 1
= 2
f(2)=5 di masukkan ke rumus f(x)
f(2)=3(2)+n
5=6+n
5-6=n
-1=n
setelah ketemu n, cari f(1)
f(1)=3(1)-1
f(1)=3-1
f(1)=2
jawabannya c