If a1,a2,a3,a4 are the coefficients of any four consecutive terms in t – InterviewSolution

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1.	If a1,a2,a3,a4 are the coefficients of any four consecutive terms in the expansion of (1+x)n, then a1a1+a2+a3a3+a4=
Answer» If $a_{1}, a_{2}, a_{3}, a_{4}$ are the coefficients of any four consecutive terms in the expansion of $(1 + x)^{n}$ , then $\frac{a_{1}}{a_{1} + a_{2}} + \frac{a_{3}}{a_{3} + a_{4}} =$

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