$$\bex \sqrt{x^2+x+1}+ \sqrt{y^2+y+1} +\sqrt{x^2-x+1}+ \sqrt{y^2-y+1}\geq 2(x+y). \eex$$ Ref. [Proof Without Words: An Algebraic Inequality, The College Mathematics Journal].
时间: 2024-10-02 21:01:26
$$\bex \sqrt{x^2+x+1}+ \sqrt{y^2+y+1} +\sqrt{x^2-x+1}+ \sqrt{y^2-y+1}\geq 2(x+y). \eex$$ Ref. [Proof Without Words: An Algebraic Inequality, The College Mathematics Journal].