Question

Which one is the geometric sequence.

Answer 1

C

Explanation:

A geometric sequence has a common ratio r between consecutive terms

A

4 ÷ 2 = 2

6 ÷ 4 = 1.5

Thus not a geometric sequence

B

1 ÷ 1 = 1

2 ÷ 1 = 2

Thus not a geometric sequence

C

`(1)/(2)` ÷ 1 =
`(1)/(2)`

`(1)/(4)` ÷
`(1)/(2)` =
`(1)/(2)`

`(1)/(8)` ÷
`(1)/(4)` =
`(1)/(2)`

D

4 ÷ 7 =
`(4)/(7)`

1 ÷ 4 =
`(1)/(4)`

Thus not a geometric sequence

Then the geometric sequence is C