thuyduongdo141
thuyduongdo141 thuyduongdo141
  • 14-06-2021
  • Mathematics
contestada

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

Respuesta :

vongoctrinh2002 vongoctrinh2002
  • 14-06-2021

Answer:

Un=n(n+1)/2

U=2013(2013+1)/2

U=2.027.091

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