Wskaż równanie okręgu o promieniu .
x2+y2=3x^2+y^2=3x2+y2=3x^2+y^2=3
x2+y2=6x^2+y^2=6x2+y2=6x^2+y^2=6
x2+y2=12x^2+y^2=12x2+y2=12x^2+y^2=12
x2+y2=36x^2+y^2=36x2+y2=36x^2+y^2=36
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