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${\huge{\frac{-1}{y^2}\cdot h^2+h-n^2=0\\h^2-y^2h+n^2y^2=0\\\Rightarrow\frac{-(-y^2)\pm\sqrt{(-y^2)^2-4n^2y^2}}{2}}}$
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Tue, 10 Oct 2017 15:38 GMT