英语翻译等式或不等式的证明灵活多样,特别地,对于较复杂的不等式或等式的证明往往不是一件容易的事,但对于某些不等式或等式,

Proof of equality or inequality flexible, in particular, for the more complex the proof of inequality or equality is often not an easy task, but for some inequality or equality, its expression (function) provided they have differentiable (differentiable) conditions, which could be directly or indirectly, of some differential properties (differentiable monotone function, differential mean value theorem, Taylor value theorem, extremum of the method can guide the nature of convex and concave functions) are Valid proof. This paper intends to prove the nature of the differential (in) equation of the various methods and techniques to be summarized,