Sum of squares
Algebra
Level
2
Find the sum of squares
1^2 + 2^2 + 3^2 + 4^2 ................. 50^2
The answer is 42925.
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1 solution
sum of squares 1^2 + 2^2 + 3^2 + 4^2 ................. 50^2 + ... + n^2
= n(n+1)(2n+1)/6 in above case n = 50
sum = 50 × 51 × 101/6 = 42925