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The vector equation of the plane passing...

The vector equation of the plane passing through the origin and the line of intersection of the planes ` vec r. vec a = lambda` and `vec r. vec b =mu` is __

A

`vecr. ( lambda veca- mu vec a)=0`

B

`vecr. ( lambda vecb- mu vec a)=0`

C

`vecr. ( lambda veca+ mu vec a)=0`

D

`vecr. ( lambda vecb+ mu vec a)=0`

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The correct Answer is:
B
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