If the coefficients of rth ,(r + 1)th , and (r + 2)th terms of (1+x)n – InterviewSolution

1.	If the coefficients of rth ,(r + 1)th , and (r + 2)th terms of (1+x)n are in A.P. then n2–(4r–1)n+4r2=
Answer» If the coefficients of rth ,(r + 1)th , and (r + 2)th terms of $(1 + x)^{n}$ are in A.P. then $n^{2} - (4 r - 1) n + 4 r^{2} =$

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