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Allison112200 Allison112200
  • 05-03-2016
  • Mathematics
Answered

Find the 9th partial sum, s9, for the sequence 1, -1, 1, -1,....

Verified Answer :

olemakpadu
olemakpadu olemakpadu
  • 05-03-2016

The ninth partial sum:

We would determine the sequence to the ninth term:

Sn =  1, -1, 1, -1, 1, -1, 1,-1, 1,...

S₉ =   1 + (-1)  +  1 +  (-1) + 1+ (-1)+ 1+ (-1) +1  = 1.

 S₉ = 1

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