Which of these are, or describe, geometric sequences?
Choose all that are correct.
A
ay = Qn-1 +3, where a1 = 2
B. Of(n) = 4.2", where n=1,2,3,.
c
an = 2An1 , where a1 = 5
D. Of(n) = 3 + 2 (n – 4), where n = 1, 2, 3, ..
E. (1,1,3,9,27,...
E
0, 1, 4, 9, 16, ...