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Question

The number of integral terms in the expansion of (51/2+71/8)1024 is................

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Solution

(512+718)1024GeneralTermfortheaboveseriesisTr+1=1024Cr(512)r(718)1024rForthetermtobeintergralrmustbetheintergalmulitipleof8Sor=0,8.......,10241024=0+(n1)×8n=129Sothenumberofintergaltermsare129.

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