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[" Let "bar(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 to "bar(alpha)" ,then "],[bar(beta)_(1)timesbar(beta)_(2)=]

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