曲面z=1-x2-y2在点(1/2,1/2,1/2)处的切平面方程是:A.x+y

admin2022-08-02  19

问题 曲面z=1-x2-y2在点(1/2,1/2,1/2)处的切平面方程是:A.x+y+z-3/2=0B.x-y-z+3/2=0C.x-y+z-3/2=0D.x-y+z+3/2=0

选项 A.x+y+z-3/2=0
B.x-y-z+3/2=0
C.x-y+z-3/2=0
D.x-y+z+3/2=0

答案 A

解析 提示 F(x,y,z)=x2+y2+z-1
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