The key to the difficulty of double integration calculation is to make appropriate transforma-tions to the integration region and the expression of the integrand function,which facilitates the simplifica-tion of the solving process.For double integrals containing x2+y2,the curves and integrands in the inte-gration region are respectively standardized,and then solved using polar coordinate transformation.It is found that calculating double integrals using standardized integrands is better than calculating double inte-grals using standardized integration regions.
关键词
二重积分/极坐标变换/积分区域/被积函数
Key words
double integral/polar coordinate transformation/integral region/integrand function
维普
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