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Find the middle term in the expansion of [x-1/x]10

Asked by Kshitij(student), on 29/11/11


 Is it -252x5???

Posted by syedmuthahar199...(student), on 29/11/11

I think, it 's something in 250 's. Please post all the steps.

Posted by Kshitij(student), on 29/11/11


The given expansion is .

General term of the given expansion,

Here n = 10, which is even.

So, th term i.e., 6th term is the middle terms of the given expansion.

Putting r = 5, we get

Thus, the middle term in the given expansion is –252.


Posted by Lalit Mehra(MeritNation Expert), on 30/11/11

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