3 suku berikutnya dari barisan -2,6,-18,54,…adalah

-2, 6, -18, 54, …
termasuk barisan geometri
a = U1 = -2
r = U2/U1 = 6/(-2) = -3
Un = a x r^(n – 1)
tiga suku berikutnya :
U5 = -2 x (-3)^4 = -2 x 81 = -162
U6 = -2 x (-3)^5 = -2 x (-243) = 486
U7 = -2 x (-3)^6 = -2 x 729 = -1458

-2,6,-18,54, -162, 486, -1458
Polanya dibagi -3/9