1.

Let bara=barj-bark and barc= bari -barj-bark. Then the vector barb satisfying bara xx barb + barc = 0 and bara. barb =3 is

Answer»

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

ANSWER :A


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