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COMEDK2018MathematicsCircle

The point (5,-7) lies outside the circle

Options

  1. Ax²+y²-8 x=0
  2. Bx²+y²-5 x+7 y=0
  3. Cx²+y²-5 x+7 y-1=0
  4. Dx²+y²-8 x+7 y-2=0

Correct answer

A. x²+y²-8 x=0

Step-by-step solution

x²+y²-8 x=0 5²+(-7)²-8 5 25+49-40=34 34>0 Here, 34>0 , so the points (5,-7) lies outside the circle.

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