1.

Let baralpha=abari+bbarj+cbark,barbeta=bbari+cbarj+abark and bargamma=cbari+abarj+bbark be three coplaner vectors with baralphanebarbetanebargamma and barr=bari+barj+bark then ~r is perpendicular to

Answer»

`BARALPHA`
`barbeta`
`BARGAMMA`
`baralpha,barbeta,bargamma`

ANSWER :C


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