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If veca,vecb and vecc are three non copl...

If `veca,vecb and vecc` are three non coplanar vectors and `vecr` is any vector in space, then `(vecxxvecb),(vecrxxvecc)+(vecb xxvecc)xx(vecrxxveca)+(veccxxveca)xx(vecrxxvecb)=` (A) `[veca vecb vecc]` (B) `2[veca vecb vecc]vecr` (C) `3[veca vecb vecc]vecr` (D) `4[veca vecb vecc]vecr`

A

`(veca.vecb.vecc)vecz`

B

`2(veca.vecb.vecc)vecr`

C

`3(veca.vecb.vecc)vecr`

D

none of these

Text Solution

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The correct Answer is:
B
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