f(x) = 3x + 2
f(a) = 3a + 2
8 = 3a + 2
6 = 3a
a = 2 (A)
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f(x) = 3x + 2
f(a) = 3a + 2
8 = 3a + 2
6 = 3a
a = 2 (A)
PEMBAHASAN ;
f(x) = 3x + 2 atau y = 3x + 2
Jika (a,8) adalah anggota fungsi sehingga a = x dan 8 = y
Nilai a ;
f(a) = 3a + 2
8 = 3a + 2
3a = 8 - 2
3a = 6 ==> a = 2
Jawabannya (A)