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If bar(a) = 2bar(i) +bar(j)-3bar(k), bar...

If `bar(a) = 2bar(i) +bar(j)-3bar(k), bar(b) = bar(i) -2bar(j)+bar(k), bar(C) =- bar(i) +bar(j)-4bar(k), bar(D) = bar(i) +bar(j)+bar(k)`, then compute `|(bar(a)xxbar(b))xx(bar(c)xxbar(d))|`.

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The correct Answer is:
`5 sqrt114`
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