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If the vectors vec a =2hati + 3hatj +6ha...

If the vectors `vec a =2hati + 3hatj +6hatk and vec b` are collinear and ` |vec b |=21, " then " vec b=`
(A) `pm 3(2hati + 3 hatj + 6 hatk)`
(B) `pm (2hati + 3hatj - 6 hatk)`
(C)`pm 21(2hati + 3 hatj + 6 hatk)`
(D)`pm 21(hati + hatj + hatk)`

A

`pm 3(2hati + 3 hatj + 6 hatk)`

B

`pm (2hati + 3hatj - 6 hatk)`

C

`pm 21(2hati + 3 hatj + 6 hatk)`

D

`pm 21(hati + hatj + hatk)`

Text Solution

Verified by Experts

The correct Answer is:
A
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