CircleMedium
Question
The locus of the point which moves so that the lengths of the tangents from it to two given concentric circles x2 + y2 = a2 and x2 + y2 = b2 are inversely as their radii has equation -
Options
A.x2 + y2 = (a + b)2
B.x2 + y2 = a2 + b2
C.(a2 + b2) (x2 + y2) = 1
D.x2 + y2 = a2 − b2
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