(0,0) r=√m>0r=√m=|0+0+m|/√2√m=|m|/√2m=m²/2m²=2mm=2
(0,0) r=√m>0r=√m=|0+0+m|/√2√m=|m|/√2m=m²/2m²=2mm=2，m=0
