摘要
对右导数及左导数在函数极值方面的应用进行了探讨，得到相应的结论：设ｆ（ｘ）的定义域为Ｄ。ｘ０是Ｄ的一个内点，ｆ′＋（ｘ０）和ｆ′－（ｘ０）都存在，且ｆ′＋（ｘ０）·ｆ′－（ｘ０）＜０，即ｆ′＋（ｘ０）和ｆ′－（ｘ０）异号，则：ｘ＝ｘ０为ｆ（ｘ）的极值点。
When discussing functional derivative and countinuous, to prove some conclusion about left derivative and right derivative applied to study functional extremumMajor conclusion:Supposing f(x) is a faunction,D is its rang of definition,x0D,x0is inner point Iff+(x0)and f-(x0) and f+(x0)f-(x0)< 0 then x0is the extreme point
出处
《天津医科大学学报》
1999年第2期24-25,共2页
Journal of Tianjin Medical University
关键词
函数
连续性
可导性
左右导数
极值
fnction
countinuous
derivative
left/right derivative
extremum
