Q. 324.4( 5 Votes )

Show that the exp

Answer :

For ,


a=2x2, and n=20


We have a formula,








To get coefficient of x9 we must have,


(x)40-3r = (x)9


• 40 - 3r = 9


• 3r = 31


• r = 10.3333


As is not possible


Therefore, the term containing x9 does not exist in the expansion of


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