Given that are the fourth, sixth and eighth terms of a geometric progression that has a first term which is positive, find the common ratio.

but answer is

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- Jun 10th 2011, 02:01 AMPunchcommon ratio
Given that are the fourth, sixth and eighth terms of a geometric progression that has a first term which is positive, find the common ratio.

but answer is - Jun 10th 2011, 03:34 AMabhishekkgp
- Jun 10th 2011, 07:06 AMPunch
- Jun 10th 2011, 09:20 AMSoroban
Hello, Punch!

Quote:

We have: .

Equate [4] and [5]: .

. .

Therefore, the common ratio is: .

- Jun 10th 2011, 09:25 AMPunch