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(bara+barb).(barb+barc)xx(bara+barb+barc...

`(bara+barb).(barb+barc)xx(bara+barb+barc)=`

A

`-[bara" "barb" "barc]`

B

`[bara" "barb" "barc]`

C

0

D

`2[bara" "barb" "barc]`

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The correct Answer is:
B
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TARGET PUBLICATION-VECTORS-Competitive Thinking
  1. If bara,barb and barc are non-coplanar, then the value of bara.{(barbx...

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  2. bara.[barb+barc)xx(bara+barb+barc)] is equal to

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  3. (bara+barb).(barb+barc)xx(bara+barb+barc)=

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  4. If bara=(1)/(sqrt10)(3overset(^)i+overset(^)k),barb=1/7(2overset(^)i+3...

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  5. If barp=(barbxxbarc)/(bara" "barb" "barc),barq=(barcxxbara)/(bara" "ba...

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  6. If vecu, vecv, vecw are three non-coplanar vectors, the (vecu+vecv-vec...

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  7. If bara,barb,barc are three non-coplanar vectors and barp,barq,barr ar...

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  8. If a, b and c are non-coplanar vectors and d=lambdaa+mub+nuc, then lam...

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  9. If vecu, vecv, vecw are non -coplanar vectors and p,q, are real numbe...

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  10. If bara,barb,barc are non-coplanar vectors and lambda is a real number...

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  11. If the vectors 2overset(^)i-3overset(^)j,overset(^)i+overset(^)j-overs...

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  12. The volumes of the parallelopiped whose edges are represented by bara=...

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  13. If the volume of the tetrahedron formed by the coterminus edges bara,b...

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  14. The volume of a parallelopiped whose edges are represented by -12bar ...

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  15. If the three co-terminous edges of a paralleloP1ped are represented by...

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  16. If bara=2overset(^)i-3overset(^)j+5overset(^)k,barb=3overset(^)i-4over...

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  17. The volume of a tetrahedron (in cubic units) whose vertices are 4overs...

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  18. The vectors bar(AB)=3overset(^)i+5overset(^)j+4overset(^)k and bar(AC)...

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  19. A(4,3,5),B(0,-2,2) and C(3,2,1) are three points. The coordinates of t...

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  20. If 4veci+7vecj+8veck,2veci+3vecj+4veck and 2veci+5vecj+7vecj are the p...

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