SOLUTION: Express the series -27+9-3+1-... using sigma notation Thank you so much!!!!! God Bless and Happy New Year!!!!

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Question 389451: Express the series -27+9-3+1-... using sigma notation
Thank you so much!!!!!
God Bless and Happy New Year!!!!
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
Note that the terms in the sum change signs, and that the exponents are decreasing. Therefore, put a %28-1%29%5Ex as part of your sum.

sum%28%28-1%29%5Ex%2A3%5E%28-x%29%2C+x+=+-3%2C+infinity%29