åMï¼(x-m)^2+(y+2)^2=5
åNï¼(x+1)^2+(y+1)^2=4
ç±é¢æå¾ï¼AB为Nç´å¾ãåå 为两å交线åç´äºåå¿è¿çº¿ï¼æ以ABåç´äºMNã
å¯ç¥MNA为ç´è§ä¸è§å½¢ï¼AN=2,AM=æ ¹å·5ï¼æ±åºMN=1ã
M(m,-2),N(-1,-1)ãæå¾m=-1,M(-1,-2)
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