到定点(1,0,0)的距离小于或等于1的点的集合是( )
A.{(x,y,z)|(x-1)2+y2+z21} |
B.{(x,y,z)|(x-1)2+y2+z2=1} |
C.{(x,y,z)|(x-1)+y+z=1} |
D.{(x,y,z)|x2+y2+z21} |
推荐套卷
到定点(1,0,0)的距离小于或等于1的点的集合是( )
A.{(x,y,z)|(x-1)2+y2+z21} |
B.{(x,y,z)|(x-1)2+y2+z2=1} |
C.{(x,y,z)|(x-1)+y+z=1} |
D.{(x,y,z)|x2+y2+z21} |