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CBSE Class 11-science Answered

Sequence and Series:Plz solve,Ans:6
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Asked by vishakhachandan026 | 25 Jul, 2019, 09:33: AM
answered-by-expert Expert Answer
Let the G.P. be a, ar, ar2 
According to the question,
a, 2ar, ar2 is in A.P.
4ar = a + ar2 
r2 - 4r + 1 = 0
solving it using quadratic formula we get r = 2 ± √3
Answered by Sneha shidid | 25 Jul, 2019, 10:19: AM
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