ʱ£¬y1 6£®Èçͼ£¬Ä³º½¿Õ¹«Ë¾ÍÐÔËÐÐÀîµÄ·ÑÓÃÓëÍÐÔËÐÐÀîµÄÖØÁ¿µÄ¹ØÏµÎªÒ»´Îº¯Êý£¬ÓÉͼ¿ÉÖªÐÐÀîµÄÖØÁ¿Ö»Òª²»³¬¹ý________ǧ¿Ë£¬¾Í¿ÉÒÔÃâ·ÑÍÐÔË£® Èý¡¢ÀýÌâչʾ£º Àý1£ºÄ³µ¥Î»¼Æ»®ÔÚÐÂÄêÆÚ¼ä×éÖ¯Ô±¹¤µ½Ä³µØÂÃÓΣ¬²Î¼ÓÂÃÓεÄÈËÊý¹À¼ÆÎª10~25ÈË£¬¼×¡¢ÒÒÁ½¼ÒÂÃÐÐÉçµÄ·þÎñÖÊÁ¿Ïàͬ£¬ÇÒ±¨¼Û¶¼ÊÇÿÈË200Ôª.¾¹ýÐÉÌ£¬¼×ÂÃÐÐÉç±íʾ¿É¸øÓèÿλÓÎ¿ÍÆßÎåÕÛÓŻݣ»ÒÒÂÃÐÐÉç±íʾ¿ÉÏÈÃâȥһλÓο͵ÄÂÃÓηÑÓã¬ÆäÓàÓοͰËÕÛÓÅ»Ý.¸Ãµ¥Î»Ñ¡ÔñÄÄÒ»¼ÒÂÃÐÐÉçÖ§¸¶µÄÂÃÓηÑÓýÏÉÙ£¿ ËÄ¡¢¿ÎÌüì²â£º 1£®Ä³µ¥Î»×¼±¸ºÍÒ»¸öÌå³µÖ÷»òÒ»¹úÓª³ö×â³µ¹«Ë¾ÖеÄÒ»¼ÒÇ©¶©ÔÂ×â³µºÏͬ£¬ÉèÆû³µÃ¿ÔÂÐÐÊ»x ǧÃ×£¬¸öÌå³µÖ÷ÊÕ·Ñy1Ôª£¬¹úÓª³ö×â³µ¹«Ë¾ÊÕ·ÑΪy2Ôª£¬¹Û²ìÏÂÁÐͼÏó¿ÉÖª£¨Èçͼ£©£¬µ±x________ʱ£¬Ñ¡ÓøöÌå³µ½ÏºÏË㣮 2£®Ä³µ¥Î»ÒªÖÆ×÷Ò»ÅúÐûΰ²ÄÁÏ£¬¼×¹«Ë¾Ìá³öÿ·Ý²ÄÁÏÊÕ·Ñ20Ôª£¬ÁíÊÕ3000ÔªÉè¼Æ·Ñ£»ÒÒ¹«Ë¾Ìá³ö£ºÃ¿·Ý²ÄÁÏÊÕ·Ñ30Ôª£¬²»ÊÕÉè¼Æ·Ñ£® (1)ʲôÇé¿öÏÂÑ¡Ôñ¼×¹«Ë¾±È½ÏºÏË㣿(2)ʲôÇé¿öÏÂÑ¡ÔñÒÒ¹«Ë¾±È½ÏºÏË㣿 (3)ʲôÇé¿öÏÂÁ½¹«Ë¾µÄÊÕ·ÑÏàͬ£¿ ½â£ºÉèÐû´«²ÄÁÏÓÐx·Ý£¬ÔòÑ¡Ôñ¼×¹«Ë¾ËùÐè·ÑÓÃΪy1Ôª£¬Ñ¡ÔñÒÒ¹«Ë¾ËùÐè·ÑÓÃΪy2Ôª£¬ÓÉÌâÒâµÃ£º £¨1£©y1= £» y2= £» £¨2£©µ±y1£¼y2ʱ£¬ÓÐ £»½âµÃ£¬ £» £¨3£©µ±y1£¾y2ʱ£¬ÓÐ £»½âµÃ£¬ £» £¨4£©µ±y1=y2ʱ£¬¼´ÓÐ £»½âµÃ£¬ £» ËùÒÔ£¬µ±²ÄÁÏ ·Ýʱ£¬Ñ¡Ôñ¼×¹«Ë¾±È½ÏºÏË㣮µ±²ÄÁÏ ·Ýʱ£¬Ñ¡ÔñÒÒ¹«Ë¾±È½ÏºÏË㣮µ±²ÄÁÏ ·Ýʱ£¬Á½¹«Ë¾µÄÊÕ·ÑÏàͬ£® 2.6Ò»ÔªÒ»´Î²»µÈʽ×é(Ò») Ò»¡¢ÎÊÌâÒýÈ룺 1£®Ò»°ãµØ£¬¹ØÓÚ Î´ÖªÊýµÄ¼¸¸ö ºÏÔÚÒ»Æð£¬¾Í×é³ÉÒ»¸öÒ»ÔªÒ»´Î²»µÈʽ×é¡£ 2£®Ò»ÔªÒ»´Î²»µÈʽ×éÖи÷¸ö²»µÈʽµÄ½â¼¯µÄ £¬½Ð×öÕâ¸öÒ»ÔªÒ»´Î²»µÈʽ×éµÄ½â¼¯¡£ 3£®Çó²»µÈʽ×éµÄ µÄ¹ý³Ì£¬½Ð×ö½â²»µÈʽ×é. 4£®½âÒ»ÔªÒ»´Î²»µÈʽ×éͨ³£²ÉÓá°·Ö¿ª½â£¬¼¯ÖÐÅС±µÄ·½·¨¡£¡°·Ö¿ª½â¡±¾ÍÊÇ·Ö±ðÇó³ö²»µÈʽ×éÖи÷¸ö²»µÈʽµÄ½â¼¯£»¡°¼¯ÖÐÅС±¾ÍÊÇÈ¡¸÷¸ö²»µÈʽµÄ½â¼¯µÄ¹«¹²²¿·Ö. ¶þ¡¢»ù´¡ÑµÁ·£º 1£®ÏÂÁв»µÈʽ×éÖУ¬ÊÇÒ»ÔªÒ»´Î²»µÈʽ×éµÄÊÇ£¨ £© ?3x?2?0,?3x?2?7?x?1?0,?3x?2?0,?A.? B.? C.? D.?1 2x?6?0y?2?0(x?2)(x?3)?0x?1?????x?2£®ÏÂÁв»µÈʽ×éÖУ¬½â¼¯ÊÇ2£¼x£¼3µÄ²»µÈʽ×éÊÇ( ) A£®??x?3?x?3?x?3 B£®? C£®? x?2x?2x?2???D£®??x?3 x?2?3£®²»µÈʽ??x?3µÄ½â¼¯£¬ÔÚÊýÖáÉϱíʾÕýÈ·µÄÊÇ£¨ £© ?x??2 A B C D 4£®²»µÈʽ×é??x?2µÄ½â¼¯Îªx£¾2£¬ÔòaµÄȡֵ·¶Î§ÊÇ_____________£® ?x?a?x?1?0µÄ½â¼¯ÊÇ________£¬ÕûÊý½âÓÐ______ __£® ?x?2?05£®²»µÈʽ×é?Èý¡¢ÀýÌâչʾ£º Àý1£º½âÏÂÁв»µÈʽ×飺 3x?2?8?? ?2x?1?2?5x?2?3(x?1)??13x?1?7?x?2?2 ËÄ¡¢¿ÎÌüì²â£º ?x?1¡Ü0£¬1£®²»µÈʽ×é?µÄ½â¼¯ÔÚÊýÖáÉϱíʾΪ£¨ £© 2x?3?5??1 A 1 x ?1 B 1 x ?1 C 1 x ?1 D 1 x 2£®£¨2012¹ã¶«ÉîÛÚ£©ÒÑÖªµãP(a?1,2a?3)¹ØÓÚxÖáµÄ¶Ô³ÆµãÔÚµÚÒ»ÏóÏÞ£¬ÔòaµÄȡֵ·¶Î§Îª£¨ £© A£®a??1 B£®?1?a?32 C£®?32?a?1 D£®a?32 3£®ÈôyͬʱÂú×ãy£«1£¾0Óëy£2£¼0£¬ÔòyµÄȡֵ·¶Î§ÊÇ_________ _____. 4£®²»µÈʽ×é??x?3?0µÄ½â¼¯ÊÇ £® ?x?1¡Ý05£®Èô²»µÈʽ×é??x?m?1x?2m?1Î޽⣬ÔòmµÄȡֵ·¶Î§ÊÇ £® ?6£®Èô²»µÈʽ×é??2x?a?1µÄ½â¼¯Îª£1£¼x£¼1£¬ÄÇô£¨a£«1£©£¨b£1£©µÄÖµµÈÓÚ________£® ?x?2b?37£®½âÏÂÁв»µÈʽ×飺 (1) ??2x¡Ý?0.5 ??3x¡Ý?2.5x?2(2)2x£¼1£x¡Üx£«5 ?x?6?08£®£¨2010ÄêÇåÔ¶£©Çó²»µÈʽ×é???1?2(x?4)?3?0µÄÕûÊý½â£® 2.6Ò»ÔªÒ»´Î²»µÈʽ×é(¶þ) Ò»¡¢ÎÊÌâÒýÈ룺 1£®Á½¸öÒ»ÔªÒ»´Î²»µÈʽ×é³ÉµÄ²»µÈʽ×éµÄ½â¼¯ÓÐÒÔÏÂËĸöÇéÐΣº Éèa?b£¬ÄÇô£º (1)²»µÈʽ×é??x?aµÄ½â¼¯ÊÇ £¬ÓÃÓïÑÔ±íÊöΪ ͬ´óÈ¡´ó £» ?x?b(2)²»µÈʽ×é??x?a?bµÄ½â¼¯ÊÇ £¬ÓÃÓïÑÔ±íÊöΪ ͬСȡС £» ?x(3)²»µÈʽ×é??x?a?x?bµÄ½â¼¯ÊÇ £¬ÓÃÓïÑÔ±íÊöΪ´óÓÚСÊýСÓÚ´óÊýÈ¡Öм䣻(4)²»µÈʽ×é??x?ax?bµÄ½â¼¯ÊÇ £¬ÓÃÓïÑÔ±íÊöΪ´óÓÚ´óÊýСÓÚСÊýÎ޽⡣ ?¶þ¡¢»ù´¡ÑµÁ·£º 1£®²»µÈʽ×é??2x?3?5?3x?2?4µÄ½â¼¯ÊÇ( ) A£®x£¼1 B£®x¡Ý2 C£®ÎÞ½â D£®1£¼x¡Ü2 2£®²»µÈʽ×é??2x?x?2x?7?4x?2µÄ½â¼¯ÔÚÊýÖáÉϱíʾÕýÈ·µÄÊÇ£¨ £© ? Èý¡¢ÀýÌâչʾ£º ?7?x?3?4xÀý1£ºÇó²»µÈʽ×é???25?4µÄ·Ç¸ºÕûÊý½â£® ?5??3x?5(4?x)?2(4?x)
Ïà¹ØÍÆ¼ö£º