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[" A circle is drawn touching the "x" -a...

[" A circle is drawn touching the "x" -axis and centre at the point which is the reflection of "],[(a,b)" in the line "y-x=0" .The equation of the circle is "],[[" 1) "x^(2)+y^(2)-2bx-2ay+a^(2)=0," 2) "x^(2)+y^(2)-2bx-2ay+b^(2)=0],[" 3) "x^(2)+y^(2)-2ax-2by+b^(2)=0," 4) "x^(2)+y^(2)-2ax-2by+a^(2)=0]]

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