BITSAT 2012 Paper
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Question : 92 of 150
Marks:
+1,
-0
The length of the tangent drawn from any point on the circle x 2 + y 2 + 2fy + λ = 0 to the circle x 2 + y 2 + 2fy + µ = 0, where µ > λ > 0, is
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