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By adding the same constant to each of 31, 7, – 1 a geometric progression results. The common ratio is :
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- 13
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2 1 3 - – 12
- None of these
Correct Option: D
As we know that A sequence is said to be in G.P if the ratio of a term to its precedding term is constant.
In 31, 7, –1, if we add 5, the sequence formed is 36, 12, 4 which is in G.P.
| ∴ Common ratio = | = | ||
| First term | Second term |
| Common ratio = | = | = | |||
| 36 | 12 | 3 |
