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JEE Advanced2014MathematicsStraight LinesActual

For a point P in the plane, let d 1 P and d 2 P be the distances of the point P from the lines x - y = 0 and x + y = 0 respectively. The area of the region R consisting of all points P lying in the first quadrant of the plane and satisfying 2 ≤ d 1 P + d 2 P ≤ 4 , is ________

Correct answer

0

Step-by-step solution

2 ≤ d 1 p + d 2 p ≤ 4 For P α , β , α > β ⇒ 2 2 ≤ 2 α ≤ 4 2 2 ≤ α ≤ 2 2 ⇒ Area of region = 2 2 2 - 2 2 = 8 - 2 = 6 s q . u n i t s

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