1.

The middle term in the expansion (x^(2)-1/(2x))^(20) is r than (r+3)^(th) term is ………

Answer»

`20 C_(14)(x/(2^(14)))`
`20C_(12)x^(2)2^(-12)`
`-20C_(7)x.2^(-13)`
NONE of these

Answer :C


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