How to find middle terms in the Binomial expansion of (x+a)^(2n+1)

Question : Find middle terms in the Binomial expansion of (x+a)^(2n+1)Solution : Binomial expansion of\[\left(x+a\right)^{2n+1},\ n\in N \]contains 2n+2 terms which is an even number. In the case of even number of terms there will be two middle terms. So…

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