haleysimpson99 haleysimpson99
  • 15-05-2016
  • Mathematics
contestada

Which equation can be used to find the nth term for the sequence 2, 5, 10, 17

Respuesta :

chengjing chengjing
  • 15-05-2016
1,2,5,10,17,26,37,50,65,82,101,122,145,170,···
an=n^2-2n+2.
Sn=n(2n^2-3n+7)/6
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