来自林卫星的问题
设D是平面区域0<=x<=1,0<=y<=2,则二重积分∫∫xydxdy=
设D是平面区域0<=x<=1,0<=y<=2,则二重积分∫∫xydxdy=
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2020-12-23 15:24
设D是平面区域0<=x<=1,0<=y<=2,则二重积分∫∫xydxdy=
设D是平面区域0<=x<=1,0<=y<=2,则二重积分∫∫xydxdy=