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If have vectors hat I – 3ht j +2 hat k a...

If have vectors `hat I – 3ht j +2 hat k` and `- hat i+ 2 hat j represent the diagonals of a parallelogram, then is aria will be

A

`sqrt 21`

B

`sqrt 21/2`

C

`2 sqrt 21`

D

`sqrt 21/4`

Text Solution

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The correct Answer is:
B
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