Question

Find the common ratio of the sequence

-125,-25,-5,-1.....

1/5

5

-100

100

Answer 1

common ratio  = -25/-125  = 1/5  answer

Answer 2

Explanation:

common ratio of a Geometric series can be found by dividing the second term by first term of the series .

we are given that first term a1= -125 and second term a2 =-25

so the common ratio must be

`r=(a2)/(a1)`

`r=(-25)/(-125)`

`r= (1)/(5)`

Hence the common ratio is 1/5.