May 10th, 2017, 04:27 AM |
#11 | |

Senior Member Joined: Nov 2015 From: hyderabad Posts: 206 Thanks: 2 | Quote:
But between which two points ? (1,1,1) and (2,-1, $\lambda$) ? I'm not at all understanding | |

May 10th, 2017, 05:05 AM |
#12 |

Senior Member Joined: Feb 2010 Posts: 627 Thanks: 98 |
If the plane is tangent to the sphere, then the distance from the center of the sphere to the plane is equal to the radius of the sphere. Complete the square on the sphere equation to put it into standard form. Then google "distance from point to plane in cartesian form". |