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If the rth term is the middle term in th...

If the rth term is the middle term in the expansion of `(x^(2)-(1)/(2x))^(20)`, then the (r+3)th term is:

A

`""^(20)C_(14)*(1)/(2^(14))*x`

B

`""^(20)C_(12)*(1)/(2^(12))*x^(2)`

C

`-(1)/(2^(13))*""^(20)C_(7)*x`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
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