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Let bara=a(1)bari+a(2)barj+a(3)bark,barb...

Let `bara=a_(1)bari+a_(2)barj+a_(3)bark,barb=b_(1)bari+b_(2)barj+b_(3)barkbarc=c_(1)bari+c_(2)barj+c_(3)bark` be three non-zero vectors such that `barc` be three non-zero vectors such that `bara` and `barb`. If the angle between `bara` and `barb` is `pi//6` then `abs({:(a_(1),a_(2),a_(3)),(b_(1),b_(2),b_(3)),(c_(1),c_(2),c_(3)):})^(2)=`

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