1.

If bara=2bari +bark, barb=bari +barj+bark, barc=4bari-3barj+7bark then the vector barr satifying barr xx barb = barc xx barb and barr.bara= 0 is

Answer»

`bari+8barj+2bark`
`bari-8barj+2bark`
`bari-8barj-2bark`
`-bari-8barj+2bark`

ANSWER :D


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