Using the ideas of function to get extreme value
HE Qiong Gueiyang No.1 Middle School of Guizhou Provoince 550002 China
In the Mathematics teaching of senior middle school, we can answer the follow-ing questions by the way of getting extrem value of function: 1. the distance between lines in dif-ferent space. 2. the manium and minium value of the distance between the point on the faper bendlines to known lines. 3. To get extreme value with enchanging elements.
【CateGory Index】： G633.6