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[" 3.The lines "bar(r)=bar(i)+bar(j)-k+s...

[" 3.The lines "bar(r)=bar(i)+bar(j)-k+s(3i-j)" and "],[bar(r)=4bar(i)-bar(k)+t(2bar(i)+3bar(k))],[[" 1) intersect "],[" 3) are skew lines "]]

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