diketahui rumus fungsi f adalah f(x)= 3x+n jika f(2)=5 ,maka f(1)....

f(x) =3x+n
f(2) = 5
f(2) = 3(2) + n = 5
6 + n =5
n = 5 -6
n= -1
f(x) = 3x - 1
f(1) = 3(1) -1 =3-1=2

3(2)+n = 5
n= -1

jadi f(1) = 3(1) -1 = 2