If \[\mathbf{a}=\mathbf{i}+2\mathbf{j}+3\mathbf{k},\,\,\,\mathbf{b}=-\mathbf{i}+2\mathbf{j}+\mathbf{k}\] and \[\mathbf{c}=3\mathbf{i}+\mathbf{j},\] then the unit vector along its resultant is [Roorkee 1980]

\[3\mathbf{i}+5\mathbf{j}+4\mathbf{k}\]

\[\frac{3\mathbf{i}+5\mathbf{j}+4\mathbf{k}}{50}\]

\[\frac{3\mathbf{i}+5\mathbf{j}+4\mathbf{k}}{5\sqrt{2}}\]

If \[\mathbf{a}=\mathbf{i}+2\mathbf{j}+3\mathbf{k},\,\,\,\mathbf{b}=-\

1.	If \[\mathbf{a}=\mathbf{i}+2\mathbf{j}+3\mathbf{k},\,\,\,\mathbf{b}=-\mathbf{i}+2\mathbf{j}+\mathbf{k}\] and \[\mathbf{c}=3\mathbf{i}+\mathbf{j},\] then the unit vector along its resultant is [Roorkee 1980]
A.	\[3\mathbf{i}+5\mathbf{j}+4\mathbf{k}\]
B.	\[\frac{3\mathbf{i}+5\mathbf{j}+4\mathbf{k}}{50}\]
C.	\[\frac{3\mathbf{i}+5\mathbf{j}+4\mathbf{k}}{5\sqrt{2}}\]
D.	None of these
Answer» D. None of these

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If \[\mathbf{a}=\mathbf{i}+2\mathbf{j}+3\mathbf{k},\,\,\,\mathbf{b}=-\mathbf{i}+2\mathbf{j}+\mathbf{k}\] and \[\mathbf{c}=3\mathbf{i}+\mathbf{j},\] then the unit vector along its resultant is [Roorkee 1980]

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