Question

Find the common ratio of the sequence -164, -82, -41, -20.5

Answer 1

r =
`(1)/(2)`

Explanation:

The common ratio r of a geometric sequence is

r =
`(a_(2) )/(a_(1) )` =
`(a_(3) )/(a_(2) )` =
`(a_(4) )/(a_(3) )` = ......

r =
`(-82)/(-164)` =
`(-41)/(-82)` =
`(1)/(2)`