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Two congruent circles with centered at (...

Two congruent circles with centered at (2, 3) and (5, 6) which intersect at right angles, have radius equal to (a) 2 `sqrt(3)` (b) 3 (c) 4 (d) none of these

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CENGAGE PUBLICATION-CONIC SECTIONS-All Questions
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  15. f(x , y)=x^2+y^2+2a x+2b y+c=0 represents a circle. If f(x ,0)=0 has e...

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