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     EduGorilla 
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    If a circle passes through the point (a, b) and cuts the circle x2 + y2 = 4 orthogonally, then the locus of its centre is

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    1. 2ax + 2by + (a2 + b2 - 4) = 0
    2. 2ax + 2by + (a2 + b2 + 4) = 0
    3. 2ax - 2by + (a2 + b2 + 4) = 0
    4. 2ax - 2by - (a2 + b2 + 4) = 0
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Reply To: If a circle passes through the point (a, b) and cuts the circle x2 + y2 = 4 orthogonally, then the l….
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