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If vectors vecalpha,vecbeta, vecgamma a...

If vectors `vecalpha,vecbeta, vecgamma` are such that `vecalpha+vecbeta+vec gamma=vec0` and `|veca|=2, |vecbeta|=3` and `|vecgamma|=4`, then the value of `2(vecalpha*vecbeta+vecbeta*vecgamma+vecgamma*vecalpha)` is -

A

-29

B

`(29)/(2)`

C

25

D

`-(29)/(2)`

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The correct Answer is:
A
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CHHAYA PUBLICATION-MCQ ZONE -Question Paper 4
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