dymondrichardson16 dymondrichardson16

19-10-2016
Mathematics

contestada

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

Respuesta :

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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