Thursday, July 5, 2012

1^2 + 2^2 + 3^2 +..........+n^2 = ?

Assalamu Alaikum. Hope you all are well by the grace of Almighty ALLAH. Today we learn how to find out the sum of square series. Take a look at the problem.

Problem: Evaluate the following series up to n.
                    1^2 + 2^2 + 3^2 +..........


Sample Input: 5

Sample Output: 55

Solution:


We know that 1^2 + 2^2 + 3^2 + 4^2 +......+ n^2 =   { n*(n+1)*(2n+1) } / 6. In this program we apply this formula. Take a look at the program.



Thank you all..:)

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