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Three vectors veca,vecb,vecc are such th...

Three vectors `veca,vecb,vecc` are such that `vecaxxvecb= 3(vecaxxvecc)`Also`|veca|=|vecb|=1, |vecc|=1/3` If the angle between `vecb` and `vecc` is `60^@` then

A

`b=3c+a`

B

`b=3c-a`

C

`a=6c+2b`

D

`a=6c-2b`

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The correct Answer is:
A, B
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