AP EAMCET Engineering 2016 Code C Paper
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Question : 28 of 160
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A circle S cuts three circles
x 2 + y 2 − 4 x − 2 y + 4 = 0
x 2 + y 2 − 2 x − 4 y + 1 = 0 and
x 2 + y 2 + 4 x + 2 y + 1 = 0 orthogonally. Then the radius of S is
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