=-1/(4e)
计算二重积分I=∫∫xye^(-x^2-y^2)dxdy,其中D为 x^2+y^2≤1在第一象限的区域
计算二重积分I=∫∫xye^(-x^2-y^2)dxdy,其中D为 x^2+y^2≤1在第一象限的区域
数学人气:297 ℃时间:2020-05-14 08:32:03
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