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Let veca = 2i + j+k, vecb = i+ 2j -k and...

Let `veca = 2i + j+k, vecb = i+ 2j -k and a` unit vector `vecc` be coplanar. If `vecc` is pependicular to `veca`. Then `vecc` is

A

`(1)/(sqrt2) (-j+ k)`

B

`(1)/(sqrt3) (-i-j-k)`

C

`(1)/(sqrt5) (i-2j)`

D

`(1)/(sqrt3) (i-j-k)`

Text Solution

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The correct Answer is:
A
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