2022年河南自试《高等数学(一)》模拟试题4四、计算题二1.已知z=f(xy,x+y),求(del^2z)/(delx^2),(del^2z)/(dely^2)2.求intint_(D)cos(x+y)dxdy,D由y=0,y=x,x=pi所围3.设y=2arctan(sqrt(x/(1-x))),求y’五、应用题1......[详情]