摘要: \(a,b,c\in R^+求证:\frac{a}{b+c}+\frac{b}{a+c}+\frac{c}{a+b}\geq\frac{3}{2}\) 证明: \(\because a,b,c\in R^+,\therefore\exists x,y,使得b=ax,c=ay\) \(\therefo 阅读全文
posted @ 2025-09-15 23:03 qzyz_HHB 阅读(46) 评论(0) 推荐(0)