1.

The position vectors of points A and B are \[\mathbf{i}-\mathbf{j}+3\mathbf{k}\] and \[3\mathbf{i}+3\mathbf{j}+3\mathbf{k}\] respectively. The equation of a plane is \[\mathbf{r}.(5\mathbf{i}+2\mathbf{j}-7\mathbf{k})+9=0\]. The points A and B

A.            Lie on the plane
B.            Are on the same side of the plane
C.            Are on the opposite side of the plane
D.            None of these
Answer» D.            None of these


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