Dear Martingale. T hose sums are not sums of orders: geometric and arithmetic sum of order. Please give me more details it is very important to me. How to calculate sum of i^2 = 1^2+2^2+3^2…..+ 999^2 and sum of i = 1 + 2 +3 + …. + 999. Hot to calculate it? I have to know exact sum number. It is huge...
the first one is clear, it is arithmetic order: 1 + 2 + 3 + ... + 999, since d = 1 and it is easy to calculate, but what is with another one 1^2+2^2+3^2…..+ 999^2. It is not geometric progression order. How to calculate this one?
1^2+2^2+3^2…..+ 999^2 . How to put this sum in the simple mathematic formula? Since, only 999^2 = 998001and imagine total sum: + 998^2 + 997^2 + 996^2 + ... + 1. I hope that now is more clear what I actually need. Thanks a lot!
Do you think that this assignment is finished if I accept this and moreover if my teacher accept it? Is there more mathematic approach and more predictable the final result of this “quadratic” sum? Since first sum (1+2+3+…+999) is more clear how to reach the final result!