摘要
本文针对平面图形面积和二重积分两个常见问题,巧用四条边界线建立两种不同形式的不等式组,同时结合图形形状和被积函数,快速而正确地选择积分变量和累次积分次序,简化了计算,提高了运算能力和解题速度。
This paper is concerned about two common problems of the square of plane figure and double integral, constructs two different kinds of system of inequalities by skifully using the boundary line, and chooses integration variables and the order of repeated integral quickly and truly on the base of the shape of figures and integrands, So the calculation can be reduced, and the operational ability and speed can be improved.
出处
《邢台职业技术学院学报》
2006年第5期11-14,共4页
Journal of Xingtai Polytechnic College
关键词
边界线
不等式组
面积
二重积分
boundary line
system of inequalities
square
double integrals
