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AP EAMCET2012MathematicsStraight Lines

If the pair of lines given by (x^2+y^2 ) ^2 =(x +y )^2 are perpendicular to each other, then is equal to

Options

  1. A0
  2. B4
  3. C3
  4. DNone of these

Correct answer

B. 4

Step-by-step solution

Given pair of lines is aligned & (x^2+y^2 ) ^2 =(x +y )^2 & (x^2+y^2 ) ^2 =x^2 ^2 +y^2 ^2 & +2 x y & y^2 ( ^2 - ^2 )-2 x y =0 aligned Pair of lines are perpendicular to each other. Coefficient of x^2+ Coefficient of y^2=0 array ll & 0+ ^2 - ^2 =0 & ^2 =1 & = 1 = 4 or 3 4 array

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