Question

Look at the following sequence. 21, 42, 126, 504, If it is geometric sequence, choose the common ratio. If it is not geometric sequence, choose “ not geometric “

Answer 1

not geometric

Explanation:

If the sequence is geometric then the common ratio r between consecutive terms should be equal

`(42)/(21)` = 2

`(126)/(42)` = 3

`(504)/(126)` = 4

There is no common ratio between consecutive terms

Hence the sequence is not geometric