kevinacalvin
kevinacalvin kevinacalvin
  • 29-10-2016
  • Mathematics
contestada

what is the sum of the sequence 46+47+48+49+...+115

Respuesta :

Аноним Аноним
  • 29-10-2016
46+47+48+49+115= 305
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luvjones726 luvjones726
  • 29-10-2016
46+(n-1)1=115

46+n-1*1=115

46+n-1=115

n+45=115

n=70

Plug back into equation to check.

46+(70-1)1=115

46+69=115 


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