What is the sum of the following sequence:
Σ(-1)^(k+1) (2k-1)^2 for k=1...n
for different n?
Solution Stats
Problem Comments
-
1 Comment
goc3
on 13 Jun 2017
Additional test cases have been added.
Solution Comments
-
2 Comments
Georges
on 10 Sep 2014
Please check your test suites, results must have opposite signs.
Grzegorz Knor
on 11 Sep 2014
Thanks! The problem now is reformulated;)
Problem Recent Solvers87
Suggested Problems
-
Swap the first and last columns
9888 Solvers
-
205 Solvers
-
Create a square matrix of multiples
330 Solvers
-
Sum of diagonals elements of a matrix
132 Solvers
-
442 Solvers
More from this Author9
Problem Tags
Select a Web Site
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
Select web siteYou can also select a web site from the following list:
Americas
- América Latina (Español)
- Canada (English)
- United States (English)
Europe
- Belgium (English)
- Denmark (English)
- Deutschland (Deutsch)
- España (Español)
- Finland (English)
- France (Français)
- Ireland (English)
- Italia (Italiano)
- Luxembourg (English)
- Netherlands (English)
- Norway (English)
- Österreich (Deutsch)
- Portugal (English)
- Sweden (English)
- Switzerland
- United Kingdom (English)