Advanced Mathematics: Given M 1 (0, 1 2) and M2 (1,-1 0), find the vector M 1M2. The midpoint of line M 1M2, straight line 2x+y-65438+.
There is something wrong with this question. The vectors can move in parallel. It is meaningless to say which point on the vector, only which point on the straight line. In addition, 2x+y- 1+z=0 represents a curved surface, not a straight line.
After M 1, the straight line M2 is x=(y- 1)/2=(z-2)/2 and 2x+y- 1+z=0, then the straight lines M 1, M2 and the plane 2x+y-/kl can be obtained.