Question

Identify all the Geometric Sequence(s) from the options below-

1, 1, 2, 3, 5, 8...
1, 2, 4, 8, 16...
4, 16, 36, 64...
81, 27, 9, 3...
-1,3,-9, 27...
1, 2, 6, 24..

Answer 1

1.) Not a sequence
2.) 2^n-1
3.) Not a sequence
4.) 81/3^n-1
5.) -(-3)^n-1
6.) Not a sequence