Question

13. Show that the middle term in the expansion of (x- 1 x )^ 2n is 1.3.5...(2n-1) 1y *(-2)^ n ​

Answer 1

Answer:

Since, 2n is even.

Therefore, (2n/2 + 1)th term, that is, (n + 1)th term will be the middle term.

Now, (n + 1)th term, that is, the middle term in (x + 1/x)2n