fabro fabro
  • 28-08-2018
  • Mathematics
contestada

s_n=1+2+...+n=?
1=1
1+2=3
1+2+3=6
1+2+3+4=10
1+2+3+4+5=15

what is the first and second value

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gavin74 gavin74
  • 28-08-2018
Idk wish you the most
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