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Let bara=bari-barj,barb=barj-bark,barc=b...

Let `bara=bari-barj,barb=barj-bark,barc=bark-bari`. lf dis a unit vector such that `bara.bard =0=[barb barc bard]` then `bard` is equals to

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The correct Answer is:
`bot1/(sqrt6)(bari+barj-bar2k)`
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