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If veca , vecb and vecc are three non-co...

If `veca , vecb` and `vecc` are three non-coplanar vectors and `vecp , vecq` and `vecr` are vectors defined by `vecp = (vecb xx vecc)/([veca vecb vecc]) , vecq = (vecc xx veca)/([veca vecb vecc])` and `vecr = (veca xx vec b)/([veca vecb vec c])` , then the value of `(veca + vecb) * (vecb + vecc) * vecq + (vecc + vec a) * vecr` =

A

3

B

0

C

1

D

2

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