设，则这个不等式被称为著名的W·Janoux猜想它曾经引起了众多数学爱好者的关注，人们从各种不同的角度，采取了不同的思考方法，证明了这个猜想是正确的．本文首先给出这个猜想的一种简单证法，然后谈谈它的各种演变形式和统一证法．1W·Janoux猜想的简单证法2W·Janoux猜想的 Suppose this inequality is called the well-known W. Janoux conjecture. It once attracted the attention of many mathematics enthusiasts. People have taken different ways of thinking from various angles and proved that this conjecture is correct. This article first gives a simple proof of this conjecture, and then talk about its various forms of evolution and unified proof. Simple proof of 1W·Janoux conjecture 2W·Janoux conjecture