if the first term of a G.P. is 5 and the sum of the first three terms is 31/5 then find the common ratio.
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Answer:
The common ratio are
Step-by-step explanation:
Given : If first term of a G.P. is 5 and the sum of the first three terms is .
To find : The common ratio?
Solution :
The geometric series is in the form
The first term of the G.P. is 5 i.e. a=5.
The sum of the first three terms is
i.e.
Substitute a=5,
Apply quadratic formula,
Therefore, The common ratio are
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