1.

Let L_(1), L_(2) and L_(3) be the lengths of tangents drawn from a point P to circles x^(2)+y^(2)=4, x^(2)+y^(2)-4x=0 and x^(2)+y^(2)-4y=0 respectively. If L_(1)^(4)=L_(2)^(2)L_(3)^(2)+16 then the locus of P are the curves, C_(1) (a straight line) and C_(2) (a circle). Q.Circum centreof the triangle formed by C_(1) and two other lines which are at angle of 45^(@)with C_(1) and tangent of C_(2) is :

Answer»

(1, 1)
(0, 0)
(-1, -1)
(2, 2)

ANSWER :B


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