çï¼è¿éé¢å¯ä»¥ä»ä¸¤æ¹é¢ç解ï¼1æ¯ä»å·¦å¯¼æ°=-1ï¼å³å¯¼æ°=1ï¼å½æ°å¨x=0å¤ä¸å¯å¯¼æ¥ç解ãå¦ä¸æ¹é¢è¿å¯ä»¥ä»å½æ°çå¾åæ¥ç解ãè§ä¸å¾ãå½æ°å¨x=0å¤æ两æ¡å线æç为+/-1çå线ï¼å°±çäºæ²¡æå线ãä»»ä½ä¸ä¸ªå¯å¯¼å½æ°ï¼è¿ä¸ç¹åªè½æä¸æ¡å线ã