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Question Number 35035 by abdo mathsup 649 cc last updated on 14/May/18
calculateun=∑k=1nk(k+1)!
Answered by tanmay.chaudhury50@gmail.com last updated on 14/May/18
Tk=k(k+1)!=k+1−1(k+1)!Tk=1k!−1(k+1)!T1=11!−12!T2=12!−13!T3=13!−14!...............................Tn=1n!−1(n+1)!soT1+T2+T3+....+Tn=11!−1(n+1)!=1−1(n+1)!
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