VectorHard
Question
The vector(s) which is/are coplanar with vectors
and perpendicular to the vector
is/are
and perpendicular to the vector
is/areOptions
A.

B.

C.

D.

Solution
Any vector in the plane of
and
is
Also,
= 0 ⇒ λ + μ = 0
⇒
and
is
Also,
= 0 ⇒ λ + μ = 0 ⇒

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