9 Three planes have equations
\(k x + y - 2 z = 0\)
\(2 x + 3 y - 6 z = - 5\)
\(3 x - 2 y + 5 z = 1\)
where \(k\) is a constant.
Investigate the arrangement of the planes for each of the following cases. If in either case the planes meet at a unique point, find the coordinates of that point.
- \(k = - 1\)
- \(k = \frac { 2 } { 3 }\)