ÌâÄ¿ÄÚÈÝ
ÏÂÁÐÃüÌâÖУº¢Ù¼¯ºÏA={ x|0¡Üx£¼3ÇÒx¡ÊN }µÄÕæ×Ó¼¯µÄ¸öÊýÊÇ8£»
¢Ú½«Èý¸öÊý£ºx=20.2£¬y=£¬z=°´´Ó´óµ½Ð¡ÅÅÁÐÕýÈ·µÄÊÇz£¾x£¾y£»
¢Ûº¯Êýf£¨x£©=x2+£¨3a+1£©x+2aÔÚ £¨-¡Þ£¬4£©ÉÏΪ¼õº¯Êý£¬ÔòʵÊýaµÄÈ¡Öµ·¶Î§ÊÇa¡Ü-3£»
¢ÜÒÑÖªº¯Êýy=4x-4•2x+1£¨-1¡Üx¡Ü2£©£¬Ôòº¯ÊýµÄÖµÓòΪ[£¬1]£»
¢Ý¶¨ÒåÔÚ£¨-1£¬0£©µÄº¯Êýf£¨x£©=log£¨2a£©£¨x+1£©Âú×ãf£¨x£©£¾0µÄʵÊýaµÄÈ¡Öµ·¶Î§ÊÇ£»
¢Þ¹ØÓÚxµÄÒ»Ôª¶þ´Î·½³Ìx2+mx+2m+1=0Ò»¸ö¸ù´óÓÚ1£¬Ò»¸ö¸ùСÓÚ1£¬ÔòʵÊýmµÄÈ¡Öµ·¶Î§£»
ÆäÖÐÕýÈ·µÄÓÐ £¨Çë°ÑËùÓÐÂú×ãÌâÒâµÄÐòºÅ¶¼ÌîÔÚºáÏßÉÏ£©
¡¾´ð°¸¡¿·ÖÎö£º¢Ù¸ù¾ÝÕæ×Ó¼¯¶¨Òå½øÐÐÅжϣ®¢ÚÀûÓÃÖ¸Êýº¯Êý£¬¶ÔÊýº¯ÊýµÄÐÔÖʱȽϴóС£®¢ÛÀûÓöþ´Îº¯ÊýµÄµ¥µ÷ÐÔÈ¥Åжϣ®
¢ÜÀûÓÃÖ¸Êýº¯ÊýµÄÐÔÖÊÈ¥Ç󣮢ÝÀûÓöÔÊýº¯ÊýµÄÐÔÖÊÈ¥Ç󣮢ÞÀûÓöþ´Îº¯Êý¸ùµÄ·Ö²¼È¥Çó£®
½â´ð£º½â£º¢Ù¼¯ºÏA={0£¬1£¬2}£¬ËùÒÔÕæ×Ó¼¯µÄ¸öÊýΪ23-1=7¸ö£¬ËùÒÔ¢Ù´íÎó£®
¢ÚÒòΪ£¬ËùÒÔ´óµ½Ð¡ÅÅÁÐÕýÈ·µÄÊÇx£¾y£¾z£¬ËùÒÔ¢Ú´íÎó£®
¢Ûº¯Êýf£¨x£©=x2+£¨3a+1£©x+2aµÄ¶Ô³ÆÖᣬËùÒÔҪʹº¯ÊýÔÚ£¨-¡Þ£¬4£©ÉÏΪ¼õº¯Êý£¬ËùÒÔÓУ¬½âµÃa¡Ü-3£¬ËùÒÔ¢ÛÕýÈ·£®
¢Üy=4x-4•2x+1=£¨2x-2£©2-3£¬ÒòΪ£¨-1¡Üx¡Ü2£¬ËùÒÔ£¬ËùÒÔµ±2x=2ʱ£¬y×îСΪ-3£®µ±Ê±£¬y×î´óΪ£¬Ôòº¯ÊýµÄÖµÓòΪ[-3£¬]£¬ËùÒԢܴíÎó£®
¢ÝÒòΪ-1£¼x£¼0£¬ËùÒÔ0£¼x+1£¼1£¬ÔòÓÉf£¨x£©£¾0µÃf£¨x£©=log£¨2a£©£¨x+1£©£¾log£¨2a£©1£¬½âµÃ0£¼2a£¼1£¬¼´£¬ËùÒÔ¢ÝÕýÈ·£®
¢ÞÉ躯Êýf£¨x£©=x2+mx+2m+1£¬Ôò¹ØÓÚxµÄÒ»Ôª¶þ´Î·½³Ìx2+mx+2m+1=0Ò»¸ö¸ù´óÓÚ1£¬Ò»¸ö¸ùСÓÚ1£¬ÔòÓÐf£¨1£©£¼0£¬¼´1+m+2m+1£¼0£¬½âµÃ£¬ËùÒÔ¢ÞÕýÈ·£®
ËùÒÔÕýÈ·µÄÓТۢݢޣ®
¹Ê´ð°¸Îª£º¢Û¢Ý¢Þ£®
µãÆÀ£º±¾Ìâ×ۺϿ¼²éÁ˸÷ÖÖ»ù±¾³õµÈº¯ÊýµÄͼÏóºÍÐÔÖÊ£¬×ÛºÏÐÔ½ÏÇ¿£®
¢ÜÀûÓÃÖ¸Êýº¯ÊýµÄÐÔÖÊÈ¥Ç󣮢ÝÀûÓöÔÊýº¯ÊýµÄÐÔÖÊÈ¥Ç󣮢ÞÀûÓöþ´Îº¯Êý¸ùµÄ·Ö²¼È¥Çó£®
½â´ð£º½â£º¢Ù¼¯ºÏA={0£¬1£¬2}£¬ËùÒÔÕæ×Ó¼¯µÄ¸öÊýΪ23-1=7¸ö£¬ËùÒÔ¢Ù´íÎó£®
¢ÚÒòΪ£¬ËùÒÔ´óµ½Ð¡ÅÅÁÐÕýÈ·µÄÊÇx£¾y£¾z£¬ËùÒÔ¢Ú´íÎó£®
¢Ûº¯Êýf£¨x£©=x2+£¨3a+1£©x+2aµÄ¶Ô³ÆÖᣬËùÒÔҪʹº¯ÊýÔÚ£¨-¡Þ£¬4£©ÉÏΪ¼õº¯Êý£¬ËùÒÔÓУ¬½âµÃa¡Ü-3£¬ËùÒÔ¢ÛÕýÈ·£®
¢Üy=4x-4•2x+1=£¨2x-2£©2-3£¬ÒòΪ£¨-1¡Üx¡Ü2£¬ËùÒÔ£¬ËùÒÔµ±2x=2ʱ£¬y×îСΪ-3£®µ±Ê±£¬y×î´óΪ£¬Ôòº¯ÊýµÄÖµÓòΪ[-3£¬]£¬ËùÒԢܴíÎó£®
¢ÝÒòΪ-1£¼x£¼0£¬ËùÒÔ0£¼x+1£¼1£¬ÔòÓÉf£¨x£©£¾0µÃf£¨x£©=log£¨2a£©£¨x+1£©£¾log£¨2a£©1£¬½âµÃ0£¼2a£¼1£¬¼´£¬ËùÒÔ¢ÝÕýÈ·£®
¢ÞÉ躯Êýf£¨x£©=x2+mx+2m+1£¬Ôò¹ØÓÚxµÄÒ»Ôª¶þ´Î·½³Ìx2+mx+2m+1=0Ò»¸ö¸ù´óÓÚ1£¬Ò»¸ö¸ùСÓÚ1£¬ÔòÓÐf£¨1£©£¼0£¬¼´1+m+2m+1£¼0£¬½âµÃ£¬ËùÒÔ¢ÞÕýÈ·£®
ËùÒÔÕýÈ·µÄÓТۢݢޣ®
¹Ê´ð°¸Îª£º¢Û¢Ý¢Þ£®
µãÆÀ£º±¾Ìâ×ۺϿ¼²éÁ˸÷ÖÖ»ù±¾³õµÈº¯ÊýµÄͼÏóºÍÐÔÖÊ£¬×ÛºÏÐÔ½ÏÇ¿£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿