摘要
分析定积分微元法中微元的条件,并通过讨论极坐标情形下求平面图形面积和平面曲线弧长这两个实例说明使用微元法的关键.
The constraint conditions of differential element method are analyzed. Through discussing how to get the area of a plane figure and the arc length of a plane curve in polar coordinates, we show the key step during using differential element method.
出处
《赣南师范学院学报》
2008年第3期139-140,共2页
Journal of Gannan Teachers' College(Social Science(2))
关键词
微元法
极坐标
高阶无穷小
differential element method
polar coordinates
infinitesimal of higher order
