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The coefficient of x^4 in (x//2-3//x^2) ...

The coefficient of `x^4` in `(x//2-3//x^2)` is `(405)/(256)` b. `(504)/(259)` c. `(450)/(263)` d. none of these

A

`405/256`

B

`504/259`

C

`450/263`

D

None of these

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A
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