[问答题]曲面z-ez+2xy=3在点(1,2,0)处的切平面方程为-----------.
[问答题]曲面z-ez+2xy=3在点(1,2,0)处的切平面方程为-----------.
[单选题](2006)曲面z=1-x2-y2在点处的切平面方程是:()A . B . C . D .
[单选题]曲面z=χ2+y2在(-1,2,5)处的切平面方程是()A . 2χ+4y+z=11B . -2χ-4y+z=-1C . 2χ-4y-z=-15D . 2χ-4y+z=-5
[单选题]曲面z=x2+y2在(-1,2,5)处的切平面方程是:()A . 2x+4y+z=11B . -2x-4y+z=-1C . 2x-4y-z=-15D . 2x-4y+z=-5
[单选题]曲面3x2+y2-z2=27在点(3,1,1)处的法线方程为().A . B . C . D .
[单选题]已知曲面方程为χ2+y2+z2-2χ+8y+6z=10,则过点(5,-2,1)的切平面方程为()。A.2χ+y+2z=0B.2χ+y+2z=10C.χ
[单选题]球面x2+y2+z2=14在点(1,2,3)处的切平面方程是().A . (x-1)+2(y-2)-(z-3)=0B . (x+1)+2(y+2)+3(z+3)=0C . (x-1)+2(y-2)+3(z-3)=0D . (x+1)+2(y+2)-(z+3)=0
[单选题]已知曲面方程为x2+y2+z2-2x+8y+6z=10,则过点(5,-2,1)的切平面方程为()。A.2x+y+2z=0B.2x+y+2z=10C.x
[单选题]已知曲面方程为x2+y2+z2-2x+8y+6z=10,则过点(5,-2,1)的切平面方程为()。A.2x+y+2z=0B.2x+y+2z=10C.x