The vector equation of the plane passing through the origin and the line of intersection of the plane \[\mathbf{r}.\mathbf{a}=\lambda \] and \[\mathbf{r}.\mathbf{b}=\mu \] is

\[\mathbf{r}.(\lambda \mathbf{a}+\mu \mathbf{b})=0\]

\[\mathbf{r}.(\lambda \mathbf{a}-\mu \mathbf{b})=0\]

\[\mathbf{r}.\,(\lambda \mathbf{b}-\mu \mathbf{a})=0\]

\[\mathbf{r}.(\lambda \mathbf{b}+\mu \mathbf{a})=0\]

The vector equation of the plane passing through the origin and the li

1.	The vector equation of the plane passing through the origin and the line of intersection of the plane \[\mathbf{r}.\mathbf{a}=\lambda \] and \[\mathbf{r}.\mathbf{b}=\mu \] is
A.	\[\mathbf{r}.(\lambda \mathbf{a}-\mu \mathbf{b})=0\]
B.	\[\mathbf{r}.\,(\lambda \mathbf{b}-\mu \mathbf{a})=0\]
C.	\[\mathbf{r}.(\lambda \mathbf{a}+\mu \mathbf{b})=0\]
D.	\[\mathbf{r}.(\lambda \mathbf{b}+\mu \mathbf{a})=0\]
Answer» C. \[\mathbf{r}.(\lambda \mathbf{a}+\mu \mathbf{b})=0\]

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The vector equation of the plane passing through the origin and the line of intersection of the plane \[\mathbf{r}.\mathbf{a}=\lambda \] and \[\mathbf{r}.\mathbf{b}=\mu \] is

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