1.

The position vector of the points P, Q, R, S are bar(i)+bar(j)+bar(k), 2bar(i)+5bar(j), 3bar(i)+2bar(j)-3bar(k) and bar(i)-6bar(j)-bar(k) respectively. Prove that bar(PQ) and bar(RS) are parallel and find the ratio of their lengths.

Answer»


ANSWER :`1:2`


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