Question: code class = asciimath > sum _ ( k = 1 ) ^ n k ^ ( 2 ) = n ( n +

code class="asciimath">\sum_(k=1)^n k^(2)=n(n+1)(2n+1)/(6) Quadratic series.
code class="asciimath">\sum_(k=1)^n k^(2)=n(n+1)(2n+1)/(6) Quadratic series.

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