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Show that the middle term in the expansi...

Show that the middle term in the expansion `(1+x)^(2n)i s` `(1. 3. 5 (2n-1))/(n!)(2)^nx^n` .

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In the expansion of `(1+x)^(2n)` in total 2n+1 terms are present.
So, middle term will be, `((2n+1)+1)/2​=n+1​`
So, middle term will be `(n+1)^(th) term.​`
So, `a_n​=2n_(C_n)​(1)^n(x)^(2n−n)​`
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