The vector equation of the line passing ...

The vector equation of the line passing through `(2, 1, -1)` and
parallel to `hati+2hatj+hatk` is

A

(a) `barr=hati+2hatj+hatk+lambda(2hati+hatj-hatk)`

B

(b) `barr=2hati+hatj-hatk+lambda(hati+2hatj+hatk)`

C

(c) `barr=-hati-2hatj-hatk+lambda(-2hati-hatj+hatk)`

D

(d) `barr=-2hati-hatj+hatk+lambda(-hati-2hatj-hatk)`

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The correct Answer is:

B

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