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In the expansion of (2x-(x^(2))/4)^(9) t...

In the expansion of `(2x-(x^(2))/4)^(9)` the sum of two middle terms is

A

`63/32x^(14)(x+8)`

B

`63/32x^(14)(x-8)`

C

`63/32x^(13)(x-8)`

D

`63/32x^(13)(8-x)`

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