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Questions  >>  JEEMAIN and NEET  >>  Mathematics  >>  Class11  >>  3-D Geometry
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Q)

The length of $\perp$ from origin to the plane passing through the point $\overrightarrow a$ and containing the line $\overrightarrow r=\overrightarrow b+\lambda \overrightarrow c$ is ?

$\begin{array}{1 1} (a)\:\large\frac{[\overrightarrow a\:\overrightarrow b\:\overrightarrow c]}{|\overrightarrow a\times \overrightarrow b+\overrightarrow b\times\overrightarrow c+\overrightarrow c\times\overrightarrow a|}\: & \:(b)\:\large\frac{[\overrightarrow a\:\overrightarrow b\:\overrightarrow c]}{|\overrightarrow a\times \overrightarrow b+\overrightarrow b\times\overrightarrow c||} \\ (c)\:\large\frac{[\overrightarrow a\:\overrightarrow b\:\overrightarrow c]}{|\overrightarrow b\times\overrightarrow c+\overrightarrow c\times\overrightarrow a|}\: & \:(d)\:\large\frac{[\overrightarrow a\:\overrightarrow b\:\overrightarrow c]}{|\overrightarrow a\times \overrightarrow b+\overrightarrow c\times\overrightarrow a|} \end{array} $

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