This paper explores multiple methods for solving a double integral problem from the 2022 na-tional entrance examination for postgraduate studies,including Green formulas,polar coordinates,sym-metric property,additivity of integrals,and cutting and mending.The paper presents a detailed analysis process and concise solutions for each method.
关键词
二重积分/极坐标变化/累次积分
Key words
double integral/polar coordinates/iterated integral
维普
万方数据