The equation of the plane passing through (- 1, 5, - 7) and parallel to the plane 2x - 5y + 7z + 11 = 0, is
The angle subtended at the point (1, 2, 3) by the points P(2, 4, 5) and Q(3, 3, 1) is
90°
60°
30°
0°
If the two lines and are perpendicular, then the value of a is equal to
- 4
5
- 5
4
C.
- 5
If the line meets the plane x + 2y + 3z = 14 at P, then the distance between P and the origin is