“对号”函数的性质及其应用

On the Properties of the "Tick" Function and It's Application

“对号”函数即形如f(x)=ax+b/x(其中a>0,b>0)的函数。掌握它的性质对解决与之相关的问题十分有效。

The ＂tick＂ function is this function as f（x）= ax＋b/x, in it a 〉 0 and b 〉 0. Grasping it＇s properties to solve correlative question is extremely effective.