Q. 83.8( 38 Votes )

Answer :

Here n is even so the middle term will be given by

The general term T_{r+1} in the binomial expansion is given by T_{r+1} = ^{n}C_{r} a^{n-r} b^{r}

Putting the values

=

= 61236 x^{5}y^{5}

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