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The system of circles x^2 + y^2 + 2lamb...

The system of circles `x^2 + y^2 + 2lambdax –2y+1 = 0 (lambda in R)` (A) Possesses only one limiting point (B) Each of the member touches y-axis (C) There are exactly two members touching x-axis (D) The radius of the greatest circle of the system touching `y=x` is `sqrt2+1`.

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