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CBSE Class 11-science Answered


The coefficients of 2nd, 3rd, 4th terms in the expansion of    are in A.P. Find n:

Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
Since,   the coefficients of 2nd, 3rd, 4th terms in the expansion of   are in
AP, we have
But n = 2 is not acceptable, because when n = 2, there are only 3 terms in the
expansion of .
Answered by | 04 Jun, 2014, 03:23: PM
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