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Value of a for which 2 hati - hatj+1hatk...

Value of a for which `2 hati - hatj+1hatk , hati + 2 hatj - 3 hatk and 3 hati + a hatj + 5 hatk` are coplanar is :

A

2

B

4

C

`-4`

D

`3.`

Text Solution

Verified by Experts

The correct Answer is:
C
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