The unit normal vector to the line joining \[\mathbf{i}-\mathbf{j}\] and \[2\,\mathbf{i}+3\,\mathbf{j}\] and pointing towards the origin is [MP PET 1989]

\[\frac{2\,\mathbf{i}-3\,\mathbf{j}}{\sqrt{13}}\]

\[\frac{4\,\mathbf{i}-\mathbf{j}}{\sqrt{17}}\]

\[\frac{-4\,\mathbf{i}+\mathbf{j}}{\sqrt{17}}\]

\[\frac{-\,2\,\mathbf{i}+3\,\mathbf{j}}{\sqrt{13}}\]

The unit normal vector to the line joining \[\mathbf{i}-\mathbf{j}\] a

1.	The unit normal vector to the line joining \[\mathbf{i}-\mathbf{j}\] and \[2\,\mathbf{i}+3\,\mathbf{j}\] and pointing towards the origin is [MP PET 1989]
A.	\[\frac{4\,\mathbf{i}-\mathbf{j}}{\sqrt{17}}\]
B.	\[\frac{-4\,\mathbf{i}+\mathbf{j}}{\sqrt{17}}\]
C.	\[\frac{2\,\mathbf{i}-3\,\mathbf{j}}{\sqrt{13}}\]
D.	\[\frac{-\,2\,\mathbf{i}+3\,\mathbf{j}}{\sqrt{13}}\]
Answer» C. \[\frac{2\,\mathbf{i}-3\,\mathbf{j}}{\sqrt{13}}\]

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The unit normal vector to the line joining \[\mathbf{i}-\mathbf{j}\] and \[2\,\mathbf{i}+3\,\mathbf{j}\] and pointing towards the origin is [MP PET 1989]

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