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If veca =hati + hatj - hatk, vecb = 2hat...

If `veca =hati + hatj - hatk, vecb = 2hati + 3hatj + hatk` and `vec c = hati + alpha hatj` are coplanar vector , then the value of `alpha` is :

A

`-4/3`

B

`3/4`

C

`4/3`

D

2

Text Solution

Verified by Experts

The correct Answer is:
C
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