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 Line r=a+λb will not meet the plane rn=q, if 

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a
b→⋅n→=0,a→⋅n→=q
b
b→⋅n→≠0,a→⋅n→≠q
c
b→⋅n→=0,a→⋅n→≠q
d
b→⋅n→≠0,a→⋅n→=q

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detailed solution

Correct option is C

We must have b→⋅n→=0 (because the line and the plane must  be parallel) and a→⋅n→≠q (as point a→ on the line should not  lie on the plane).


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