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2二重积分自测题(一)选择题1.设D是由直线0x,0y,3yx,5yx所围成的闭区域,记:DdyxI)ln(1,DdyxI)(ln22,则()A.21IIB.21IIC.122IID.无法比较2.设D是由x轴和xxy(sin[0,])所围成,则积分Dyd()A.6B.4C.3D.23.设积分区域D由2xy和2xy围成,则Ddyxf),(()A.2122),(xxdyyxfdxB.2120),(dyyxfdxC.1222),(xxdyyxfdxD.1022),(xxdyyxfdx4.设),(yxf是连续函数,则累次积分402),(xxdyyxfdx()A.40412),(yydxyxfdyB.40412),(yydxyxfdyC.4041),(ydxyxfdyD.40212),(yydxyxfdy5.累次积分2022xydyedx()A.)1(212eB.)1(314eC.)1(214eD.)1(312e6.设D由14122yx确定,若DdyxI2211,DdyxI)(222,DdyxI)ln(223,则1I,2I,3I之间的大小顺序为()A.321IIIB.231IIIC.132IIID.123III7.设D由1||x,1||y确定,则Dxyxydxdyxesincos()A.0B.eC.2D.2e8.若积分区域D由1yx,0x,0y确定,且101)()(xdxxxfdxxf,则Ddxdyxf)(()3A.2B.0C.21D.19.若0110101010)()(21),(),(),(xxyxyxdxyxfdydyyxfdxdyyxfdx,则()A.1)(1yyx,0)(2yxB.1)(1yyx,yyx1)(2C.yyx1)(1,1)(2yyxD.0)(1yx,1)(2yyx(二)填空题1.设D是由直线xy,xy21,2y所围成的区域,则Ddxdy.2.已知D是由bxa,10y所围成的区域,且Ddxdyxyf1)(,则badxxf)(.3.若D是由1yx和两坐标轴围成的区域,且Ddxxdxdyxf10)()(,那么)(x.4.交换积分次序:2122),(yydxyxfdy.5.设D由1422yx确定,则Ddxdy.6.交换积分次序:0sin0),(xdyyxfdx.7.交换积分次序:dyyxfdxxx2),(10=.8.交换积分次序yydxyxfdy2202),(=.(三)计算题1.选择适当的坐标系和积分次序求下列二重积分(1)Dydxdyxcos2,其中D由21x,20y确定,(2)Ddxdyyx)(,其中D由xyx222确定,(3)Ddxdyyx22,其中D是圆环形闭区域:4122yx(4)Dxydxdy,其中D是由抛物线2yx及y=x所围成的闭区域.42.计算下列积分(1)606cosydxxxdy,(2)313ln1ydxxydy,
本文标题:二重积分练习题
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