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If bara= 2bari+barj-3bark, barb = bari-2...

If `bara= 2bari+barj-3bark, barb = bari-2barj+bark, barc = -bari+barj-4bark" and "bard=bari+barj+bark`, then compute `|(bara xx barb)xx (barc xx bard)|`.

Text Solution

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The correct Answer is:
`5sqrt(114)`
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