The point (-1, -2, -3) lies in the octant

Clearly, the point (-1, -2, -3) lies in o x' y' z' octant.

The point equidistant from the four points (a, 0, 0), (0, b, 0), (0, 0, c) and (0, 0, 0) will be

The ratio in which the line joining (2, 4, 5), (3, 5, -4) is divided by the yz-plane is

If A(0, 0, 0), B(2, -3, 3), C(-2, 3, -3) are three collinear points, then