题目
单叶双曲面x^2+y^2-z^2=1在点(1,1,1)处的切平面方程为____。A. x+y+z-1=0B. x-y-z-1=0C. x+y-z+1=0D. x+y-z-1=0
单叶双曲面$x^{2}+y^{2}-z^{2}=1$在点(1,1,1)处的切平面方程为____。
A. x+y+z-1=0
B. x-y-z-1=0
C. x+y-z+1=0
D. x+y-z-1=0
题目解答
答案
D. x+y-z-1=0
A. x+y+z-1=0
B. x-y-z-1=0
C. x+y-z+1=0
D. x+y-z-1=0