SOLUTION: Find the sum of the first n terms of the following series
1-4+9-16+----
Algebra.Com
Question 984371: Find the sum of the first n terms of the following series
1-4+9-16+----
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
^{i+1}\,i^2\ =\ \left(-1\right)^{n+1}\,\frac{1}{2}\left(n\left(n\ +\ 1\right)\right))
If you would like a proof, let me know and we can negotiate a fee.
John
My calculator said it, I believe it, that settles it
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