diket f (3a + 1) = 6a - 1 . rumus fungsi f(x) adalah? pakai cara ya terima kasih :)

Bab Fungsi
Matematika SMA Kelas XI

f(3a + 1) = 6a - 1
f(3 . a/3 + 1) = 6 . a/3 - 1
f(a + 1) = 2a - 1
f(a - 1 + 1) = 2(a - 1) - 1
f(a) = 2a - 3

Misal x = 3a + 1
a = (x - 1)/3

f(3a+1) = 6a - 1
f (x) = 6[(x-1)/3] - 1
= 2(x-1) - 1
= 2x - 2 - 1 = 2x - 3