£¨2013•¸Ê¾®×ÓÇøһģ£©Ä³ÖÐѧÒÕÊõ½ÚÆڼ䣬ÏòȫУѧÉúÕ÷¼¯Êé»­×÷Æ·£®ÍõÀÏʦ´ÓȫУ14¸ö°àÖÐËæ»ú³éÈ¡ÁË4¸ö°à£¬¶ÔÕ÷¼¯µ½µÄ×÷Æ·µÄÊýÁ¿½øÐÐÁË·ÖÎöͳ¼Æ£¬ÖÆ×÷ÁËÁ½·ù²»ÍêÕûµÄͳ¼Æͼ£¨Èçͼ1¡¢2£©£®

£¨1£©ÍõÀÏʦËùµ÷²éµÄ4¸ö°àÕ÷¼¯µ½×÷Æ·¹²
12
12
¼þ£¬ÆäÖÐB°àÕ÷¼¯µ½×÷Æ·
3
3
¼þ£¬Çë°Ñͼ2²¹³äÍêÕû£»
£¨2£©ÍõÀÏʦËùµ÷²éµÄËĸö°àƽ¾ùÿ¸ö°àÕ÷¼¯×÷Æ·¶àÉÙ¼þ£¿Çë¹À¼ÆȫУ¹²Õ÷¼¯µ½×÷Æ·¶àÉÙ¼þ£¿
£¨3£©Èç¹ûȫУ²ÎÕ¹×÷Æ·ÖÐÓÐ5¼þ»ñµÃÒ»µÈ½±£¬ÆäÖÐÓÐ3Ãû×÷ÕßÊÇÄÐÉú£¬2Ãû×÷ÕßÊÇÅ®Éú£®ÏÖÔÚÒªÔÚÆäÖгéÁ½ÈËÈ¥²Î¼ûѧУ×ܽá±íÕÃ×ù̸»á£¬ÓÃÊ÷״ͼ»òÁÐ±í·¨Çó³öÇ¡ºÃ³éÖÐÒ»ÄÐһٵĸÅÂÊ£®
·ÖÎö£º£¨1£©¸ù¾ÝCÔÚÉÈÐÎͼÖеĽǶÈÇó³öËùÕ¼µÄ·ÝÊý£¬ÔÙ¸ù¾ÝCµÄÈËÊýÊÇ5£¬ÁÐʽ½øÐмÆËã¼´¿ÉÇó³ö×÷Æ·µÄ¼þÊý£¬È»ºó¼õÈ¥A¡¢C¡¢DµÄ¼þÊý¼´ÎªBµÄ¼þÊý£»
£¨2£©Çó³öƽ¾ùÿһ¸ö°àµÄ×÷Æ·¼þÊý£¬È»ºó³ËÒ԰༶Êý14£¬¼ÆËã¼´¿ÉµÃ½â£»
£¨3£©»­³öÊ÷״ͼ£¬ÔÙ¸ù¾Ý¸ÅÂʹ«Ê½ÁÐʽ½øÐмÆËã¼´¿ÉµÃ½â£®
½â´ð£º½â£º£¨1£©¸ù¾ÝÌâÒâµÃ£º
µ÷²éµÄ4¸ö°àÕ÷¼¯µ½×÷Æ·ÊýΪ£º5¡Â
150
360
=12£¨¼þ£©£¬
B°à×÷Æ·µÄ¼þÊýΪ£º12-2-5-2=3£¨¼þ£©£¬
¹Ê´ð°¸Îª£º12£»3£®
Èçͼ£º


£¨2£©ÍõÀÏʦËùµ÷²éµÄËĸö°àƽ¾ùÿ¸ö°àÕ÷¼¯×÷Æ·ÊÇ£º12¡Â4=3£¨¼þ£©£¬
ȫУ¹²Õ÷¼¯µ½µÄ×÷Æ·£º3¡Á14=42£¨¼þ£©£»
£¨3£©»­Ê÷״ͼÈçÏ£º

¹²ÓÐ20ÖÖ»ú»á¾ùµÈµÄ½á¹û£¬ÆäÖÐÒ»ÄÐһŮռ12ÖÖ£¬
ÔòÇ¡ºÃ³éÖÐÒ»ÄÐһٵĸÅÂÊÊÇ
12
20
=
3
5
£®
µãÆÀ£º±¾Ì⿼²éµÄÊÇÌõÐÎͳ¼ÆͼºÍÉÈÐÎͳ¼ÆͼµÄ×ÛºÏÔËÓ㬶Á¶®Í³¼Æͼ£¬´Ó²»Í¬µÄͳ¼ÆͼÖеõ½±ØÒªµÄÐÅÏ¢Êǽâ¾öÎÊÌâµÄ¹Ø¼ü£®ÌõÐÎͳ¼ÆͼÄÜÇå³þµØ±íʾ³öÿ¸öÏîÄ¿µÄÊý¾Ý£»ÉÈÐÎͳ¼Æͼֱ½Ó·´Ó³²¿·ÖÕ¼×ÜÌåµÄ°Ù·Ö±È´óС£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£º

£¨2013•¸Ê¾®×ÓÇø¶þÄ££©ÔÚº¯Êýy=
2x-3
ÖУ¬×Ô±äÁ¿xµÄÈ¡Öµ·¶Î§ÊÇ
x¡Ý
3
2
x¡Ý
3
2
£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£º

£¨2013•¸Ê¾®×ÓÇø¶þÄ££©ÔÚ?ABCDÖУ¬EÊÇADÉÏÒ»µã£¬AE=AB£¬¹ýµãE×÷Ö±ÏßEF£¬ÔÚEFÉÏÈ¡Ò»µãG£¬Ê¹µÃ¡ÏEGB=¡ÏEAB£¬Á¬½ÓAG£®
£¨1£©Èçͼ1£¬µ±EFÓëABÏཻʱ£¬Èô¡ÏEAB=60¡ã£¬ÇóÖ¤£ºEG=AG+BG£»
£¨2£©Èçͼ2£¬µ±EFÓëABÏཻʱ£¬Èô¡ÏEAB=¦Á£¨0¡ã£¼¦Á£¼90¡ã£©£¬ÇëÄãÖ±½Óд³öÏ߶ÎEG¡¢AG¡¢BGÖ®¼äµÄÊýÁ¿¹Øϵ£¨Óú¬¦ÁµÄʽ×Ó±íʾ£©£»
£¨3£©Èçͼ3£¬µ±EFÓëCDÏཻʱ£¬ÇÒ¡ÏEAB=90¡ã£¬ÇëÄãд³öÏ߶ÎEG¡¢AG¡¢BGÖ®¼äµÄÊýÁ¿¹Øϵ£¬²¢Ö¤Ã÷ÄãµÄ½áÂÛ£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£º

£¨2013•¸Ê¾®×ÓÇø¶þÄ££©Èçͼ£¬ÔÚÁâÐÎABCDÖУ¬¶Ô½ÇÏßAC£¬BDÏཻÓÚµãO£¬EΪABµÄÖе㣬ÇÒOE=a£¬ÔòÁâÐÎABCDµÄÖܳ¤Îª
8a
8a
£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£º

£¨2013•¸Ê¾®×ÓÇøһģ£©ÒÑÖª¹ØÓÚxµÄ·½³Ìx2+mx-6=0µÄÒ»¸ö¸ùΪ2£¬Ôòm=
1
1
£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÊýѧ À´Ô´£º ÌâÐÍ£º

£¨2013•¸Ê¾®×ÓÇø¶þÄ££©¶ÔijÖÖÔ­¼ÛΪ289ÔªµÄÒ©Æ·½øÐÐÁ¬ÐøÁ½´Î½µ¼ÛºóΪ256Ôª£¬Éèƽ¾ùÿ´Î½µ¼ÛµÄ°Ù·ÖÂÊΪx£¬Ôò¿ÉÁз½³ÌΪ
289£¨1-x£©2=256
289£¨1-x£©2=256
£®

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸