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  5. Top | #184

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    1) x^2+y^2=0 implies x=y=0
    2) x^.2+y^2=9 implies (x,y)is a point on the circle x^2+y^2=9

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  7. Top | #185

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    ; 08-17-2019 09:22 PM

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  13. Top | #188

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