曲面x^2+cos(xy)+yz+x=0在点(0,1,-1)处的切平面方程为 A.Ax-y+z=-2B.x+y+z=0C.x-2y+z=-3D.x-y-z=0
曲面x^2+cos(xy)+yz+x=0在点(0,1,-1)处的切平面方程为
A.Ax-y+z=-2
B.x+y+z=0
C.x-2y+z=-3
D.x-y-z=0
B.x+y+z=0
C.x-2y+z=-3
D.x-y-z=0
参考解析
解析:
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