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Let bara,barb and barc are three mutually perpendicular unit vectors and a unit vector barr satisfying the equation (barb times barc) times (barr times bara)+(barc times bara) times (barr times barb)+(bara-barb) times (barr -barc)=0 then barr is |
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Answer» `1/sqrt3(bara+barb+barc)` |
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