Hello from MrBillDoesMath!
Answer:
2, 12, 432
(the third choice)
Discussion:
a(1) = 2
a(2) = 3 (a(1))^2 = 3 * (2)^2 = 3 * 4 = 12
a(3) = 3 ( a(2))^2 = 3 * (12)^2 = 3 * 144 =432
which is the third choice
Thank you,
MrB