[xcos(x+y)+sin(x+y)]dx+xcos(x+y)dy=0.
[xcos(x+y)+sin(x+y)]dx+xcos(x+y)dy=0.
[xcos(x+y)+sin(x+y)]dx+xcos(x+y)dy=0.
计算下列二重积分xcos(x+y)dσ,其中D是顶点分别为(0,0),(π,0)和(π,π)的三角形闭区域.
A.E^X*Sin(30*3.14/180)*2*x/x+y*log(x)
B.Exp(x)*Sin(30)*2*x/(x+y)*ln(x)
C.Exp(X)*Sin(30*3.14/180)*2*x/(x+y)*log(x)
D.Exp(X)*Sin(30*3.14/180)*2*x/(x+y)*ln(x)
A.-sin(x+y)(1+y’)=4
B.-sin(1+y’)=4
C.-sin(x+y)=4
D.-sin(x+y)y’=4
代数式eXSin(30°)2x/(x+y)Inx对应的Visual Basic表达式是()。
A.E^*Sin(30*3.14/180)*2*X/X+Y*Log(X)
B.Exp(X)*Sin(30)*2*X/(X+Y)*Ln(X)
C.Exp(X)*Sin(30*3.14/180)*2*X/(X+Y)*Log(X)
D.Exp(X)*Sin(30*3.14/180)*2*X/(X+Y)*Ln(X)
A.Eˆ*Sin(30*3.14/180)*2*X/X+Y*Log(X)
B.Exp(X)*Sin(30)*2*X/(X+Y)*Ln(X)
C.Exp(X)*Sin(30*3.14/180)*2*X/(X+Y)*Log(X)
D.Exp(X)*Sin(30*3.14/180)*2*X/(X+Y)*Ln(X)
A.E^*Sin(30*3.14/180)*2*X/X+Y*Log(X)
B.Exp(X)*Sin(30)*2*X/(X+Y)*Ln(X)
C.Exp(X)*Sin(30*3.14/180)*2*x/(x+y)*Log(x)
D.Exp(X)*Sin(30*3.14/180)*2*X/(X+Y)*Ln(X)
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