User:Hirmuolio Pine/sandbox2
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Revision as of 07:53, 12 January 2020 by Hirmuolio Pine (talk | contribs)
[math]\left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right)[/math]
