dymondrichardson16 dymondrichardson16
  • 19-10-2016
  • Mathematics
contestada

find a1 for the geometric series r=-1 and s11=7

Respuesta :

juliehatcher9
juliehatcher9 juliehatcher9
  • 19-10-2016
s11 = a(1-r^n)/(1-r) 
7 = a (1- (-1)^11) / [(1-(-1)] 
7 = a( 2)/2 
a=7
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