The value of k for which the vectors \[\mathbf{a}=\mathbf{i}-\mathbf{j}\] and \[\mathbf{b}=-2\,\mathbf{i}+k\,\mathbf{j}\] are collinear is [Pb. CET 2004]

The value of k for which the vectors \[\mathbf{a}=\mathbf{i}-\mathbf{j

1.	The value of k for which the vectors \[\mathbf{a}=\mathbf{i}-\mathbf{j}\] and \[\mathbf{b}=-2\,\mathbf{i}+k\,\mathbf{j}\] are collinear is [Pb. CET 2004]
A.	2
B.	\[\frac{1}{2}\]
C.	\[\frac{1}{3}\]
D.	3
Answer» B. \[\frac{1}{2}\]

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The value of k for which the vectors \[\mathbf{a}=\mathbf{i}-\mathbf{j}\] and \[\mathbf{b}=-2\,\mathbf{i}+k\,\mathbf{j}\] are collinear is [Pb. CET 2004]

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