The points and are equidistant from the plane

MATHEMATICS · Single correct · ISC · Mathematics · Three-Dimensional Geometry · Three-Dimensional Geometry

Problem

The points

\hat{i} + \hat{j} + 3\hat{k}

and

3\hat{i} + 3\hat{j} + 3\hat{k}

are equidistant from the plane

\mathbf{r} \cdot (5\hat{i} + 2\hat{j} - 7\hat{k}) + 9 = 0

, then they are (1) on the same sides of the plane (2) parallel of the plane (3) on the opposite sides of the plane (4) None of the above