Home > Numbers
| Another Square Sequence (Posted on 2003-12-23) |
 |
If you subtract the sum of the first x numbers, squared, from the sum of the next x numbers, squared, (for example, 6² + 5² + 4² - 3² - 2² - 1²); you will get (x²)(2x+1) and also x²(x+1)² minus x^4. Prove why this works.
solution
|
 | Comment 4 of 6 | 
|
its because
x^2(2x+1)=x^2(x+1)^2-x^4
|
|
Posted by sumit
on 2004-06-14 08:20:05 |
|
|
Please log in:
Forums (0)
Newest Problems
Random Problem
FAQ |
About This Site
Site Statistics
New Comments (3)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On
Chatterbox:
|
