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Most Important Selected Qs for JEE AdvancedMathematicsCircle

Paragraph: A ray of light strikes a line mirror y=0 along the line L₁: x-3 y=1 and reflects along the line L₂=0 . There is another line mirror x-4=0 in the way of reflected ray. After 2nd reflection ray moves along the line L ₃=0 and finally it travels in the direction of the line L ₄=0 after 3rd reflection from line mirror y+2=0 . On the basis of above informations, answer the following questions: Question: Equation

Options

  1. A(x-1)^2+(y+1)^2= 3 10
  2. B(x-1)^2+(y+1)^2= 9 10
  3. C(x-1)^2+ (y+ 1 2 )^2= 3 10
  4. D(x-1)^2+ (y+ 1 2 )^2= 9 10

Correct answer

B. (x-1)^2+(y+1)^2= 9 10

Step-by-step solution

Centre of the circle is (1,-1) and r= | 1-3-1 1+9 |= 3 10 equation of circle is (x-1)^2+(y+1)^2= 9 10

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