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If lamda ( 3 hati + 2 hatj - 6 hatk ) is...

If `lamda ( 3 hati + 2 hatj - 6 hatk ) `is unit vector, then the values of `lamda` are

A

`pm (1)/(7)`

B

`pm7`

C

`pm sqrt43`

D

`pm (1)/(sqrt43)`

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The correct Answer is:
A
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