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If sum of the perpendicular distances of a variable point P ( x , y ) from the lines x + y – 5 = 0 and 3 x – 2 y + 7 = 0 is always 10. Show that P must move on a line. |
| Answer» If sum of the perpendicular distances of a variable point P ( x , y ) from the lines x + y – 5 = 0 and 3 x – 2 y + 7 = 0 is always 10. Show that P must move on a line. | |