Question

Given the following geometric sequence, find the common ratio.

{0.45, 0.9, 1.8, ...}


0.45
0.9
2

Answer 1

Answer: It should be 2

Explanation:

0.9/0.45=2

Answer 2

Common ratio of the geometric sequence {0.45, 0.9, 1.8, ...} is :

2

Explanation:

If the nth term of the geometric sequence is A(n) then, the common ratio is given by:

A(n+1)/A(n)

Here, we are given a geometric sequence:

{0.45, 0.9, 1.8, ...}

A(3)/A(2) will give us the common ratio

`(A(3))/(A(2))=(1.8)/(0.9)=2`

Hence, common ratio of the geometric sequence {0.45, 0.9, 1.8, ...} is :

2