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[Letbar(alpha)=3bar(i)+bar(j)" and "bar(...

[Letbar(alpha)=3bar(i)+bar(j)" and "bar(beta)=2bar(i)-bar(j)+3bar(k).],[" If "bar(beta)=bar(beta)_(1)-bar(beta)_(2)" where "bar(beta)_(1)" is parallel to "],[bar(alpha)" and "bar(beta)_(2)" is perpendicular "tobar(alpha)" .Then "],[bar(beta)_(1)timesbar(beta)_(2)" equal to "]

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