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15. The straight line L through the origin meets the line x+y=1 and x+y=3 at P and Q respectively. Through P and Q, two straight lines L1 and L2 are drawn parallel to 2x-y=5 and 3x+y=5 respectively. Lines L1 and L2 intersect at R. Then what is the locus of point R ? |
| Answer» 15. The straight line L through the origin meets the line x+y=1 and x+y=3 at P and Q respectively. Through P and Q, two straight lines L1 and L2 are drawn parallel to 2x-y=5 and 3x+y=5 respectively. Lines L1 and L2 intersect at R. Then what is the locus of point R ? | |