Q. 265.0( 1 Vote )

The coefficient of in the expansion is.

A.

B.

C.

D. None of these

Answer :

Given:

For x^{8} y^{10}; k=10

So coefficient is ^{18}C_{10}

Also ^{18}C_{10} = ^{18}C_{8}

So coefficient = ^{18}C_{8}

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