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The 2 vectors hat(j) + hat(k) and 3hat(i...

The 2 vectors `hat(j) + hat(k)` and `3hat(i) - hat(j) + 4hat(k)` represents the two sides AB and AC, respectively of a `Delta ABCD`. The length of the median through A is

A

`(sqrt(34))/(2)`

B

`(sqrt(48))/(2)`

C

`sqrt(18)`

D

None of these

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The correct Answer is:
A
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