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1+2+3+....+2012+2013

1+2+3+....+2012+2013
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1 vote
1+2+3+....+2012+2013

asked
User Mariel
by
7.8k points

1 Answer

5 votes

Answer:

Un=n(n+1)/2

U=2013(2013+1)/2

U=2.027.091

answered
User Patrick Vogt
by
8.2k points
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