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If in the expansion of (x^(3)-1/(x^(2)))...

If in the expansion of `(x^(3)-1/(x^(2)))^(n)`the sum of the coefficients of `x^(5)` and `x^(10)` is 0, then the coefficient of `x^(20)` is:

A

`""^(20)C_(6)`

B

`-""^(20)C_(6)`

C

`""^(15)C_(5)`

D

`-""^(15)C_(5)`

Text Solution

Verified by Experts

The correct Answer is:
D
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Knowledge Check

  • In the expansion of ((x)/(2)-(3)/(x^(2)))^(10) , the coefficient of x^(4) is

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    B
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    D
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