The lines barr=(2hati+hatj-3hatk)+((t)/...

The lines `barr=(2hati+hatj-3hatk)+((t)/(sqrt(6)))(2hati-hatj+hatk)` and
`barr=(hati+hatk)+t(4hati-hatj+lambdahatk)` are perpendicular to each other,
then value of `lambda` is

A

(a) `9`

B

(b) `-9`

C

(c) `7`

D

(d) `-7`

Verified by Experts

The correct Answer is:

B

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