if the 6th,7th,8th & 9th terms in the expansion of (x+y)n are respectively a,b,c&d then show  that b2 - ac/c2 -bd=4a/3c

Asked by Udit Narayan Sabar | 26th Apr, 2014, 10:19: PM

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Answered by  | 26th Apr, 2014, 11:29: PM

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