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TS EAMCET · Maths · Straight Lines

A(1, 0), B(0, 2) and C(1, 2) are three points on XY-plane. If a point P(x, y) which moves such that the area of triangle PAB is twice the area of the triangle ABC, then the locus of the point P is

  1. A 4x2-4xy+y2-8x+4y=0
  2. B 4x2+4xy+y2-8x-4y-12=0
  3. C 4x2-4xy+y2-8x+4y-12=0
  4. D 4x2+4xy+y2-8x+4y+12=0
Verified Solution

Answer & Solution

Correct Answer

(B) 4x2+4xy+y2-8x-4y-12=0

Step-by-step Solution

Detailed explanation

We know that the area of the triangle formed by points Ax1, y1, Bx2, y2 and Cx3, y3 is, Ar∆ABC=12x1y11x2y21x3y31=12111x1x2x3y1y2y3 Here, we have points A1, 0, B0, 2 , C1, 2 and Px, y Given,…