SOLUTION: I need help figuring out how to solve this. It is an infinite series, 1+3+9+27+81+243+...= -1/2 I need to prove that this infinite series equals -1/2.

Question 633283: I need help figuring out how to solve this.
It is an infinite series, 1+3+9+27+81+243+...= -1/2
I need to prove that this infinite series equals -1/2.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
I need help figuring out how to solve this.
It is an infinite series, 1+3+9+27+81+243+...= -1/2
I need to prove that this infinite series equals -1/2.
-----------
It obviously does not = -1/2.
Why would it be negative?
The 1st term is > -1/2

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