ÌâÄ¿ÄÚÈÝ
Ϊ»º½âÓͼÛÉÏÕǸø³ö×â³µÐÐÒµ´øÀ´µÄ³É±¾Ñ¹Á¦£¬Ä³Žˆ×Ô2012Äê5ÔÂ1ÈÕÆ𣬵÷
Ϊ»º½âÓͼÛÉÏÕǸø³ö×â³µÐÐÒµ´øÀ´µÄ³É±¾Ñ¹Á¦£¬Ä³Žˆ×Ô2012Äê5ÔÂ1ÈÕÆ𣬵÷Õû³ö×â³µÔ˼ۣ¬µ÷Õû·½°¸¼ûÏÂÁбí¸ñ¼°Í¼Ïñ£¨ÆäÖÐa,bΪ³£Êý£©.
ÉèÐÐʻ·³Ìx kmʱ£¬µ÷¼ÛÇ°µÄÔ˼ÛΪy1£¨Ôª£©£¬µ÷¼ÛºóµÄÔ˼ÛΪy2£¨Ôª£©.Èçͼ£¬ÕÛÏßABC±íʾy2ÓëxÖ®¼äµÄº¯Êý¹Øϵʽ£¬Ï߶ÎEF±íʾµ±0¡Üx¡Ü3ʱ£¬y1ÓëxµÄº¯Êý¹Øϵʽ£¬¸ù¾Ýͼ±íÐÅÏ¢£¬Íê³ÉÏÂÁи÷Ì⣺
СÌâ1:Ìî¿Õ£ºa= ,¡¡b= .
СÌâ2:д³öµ±x£¾3ʱ£¬y1ÓëxµÄº¯Êý¹Øϵʽ£¬²¢ÔÚÉÏͼÖл³ö¸Ãº¯ÊýµÄͼÏó.
СÌâ3:º¯Êýy1Óëy2µÄͼÏóÊÇ·ñ´æÔÚ½»µã£¿Èô´æÔÚ£¬Çó³ö½»µãµÄ×ø±ê£¬²¢ËµÃ÷¸ÃµãµÄʵ¼ÊÒâÒ壻Èô²»´æÔÚ£¬Çë˵Ã÷ÀíÓÉ.
Ϊ»º½âÓͼÛÉÏÕǸø³ö×â³µÐÐÒµ´øÀ´µÄ³É±¾Ñ¹Á¦£¬Ä³Žˆ×Ô2012Äê5ÔÂ1ÈÕÆ𣬵÷Õû³ö×â³µÔ˼ۣ¬µ÷Õû·½°¸¼ûÏÂÁбí¸ñ¼°Í¼Ïñ£¨ÆäÖÐa,bΪ³£Êý£©.
ÐÐʻ·³Ì | Êշѱê×¼ | |
µ÷¼ÛÇ° | µ÷¼Ûºó | |
²»³¬¹ý3kmµÄ²¿·Ö | Æð²½¼Û6Ôª | Æð²½¼ÛaÔª |
³¬¹ý3kmµÄ²¿·Ö | ÿ¹«Àï2.1Ôª | ÿ¹«ÀïbÔª |
СÌâ1:Ìî¿Õ£ºa= ,¡¡b= .
СÌâ2:д³öµ±x£¾3ʱ£¬y1ÓëxµÄº¯Êý¹Øϵʽ£¬²¢ÔÚÉÏͼÖл³ö¸Ãº¯ÊýµÄͼÏó.
СÌâ3:º¯Êýy1Óëy2µÄͼÏóÊÇ·ñ´æÔÚ½»µã£¿Èô´æÔÚ£¬Çó³ö½»µãµÄ×ø±ê£¬²¢ËµÃ÷¸ÃµãµÄʵ¼ÊÒâÒ壻Èô²»´æÔÚ£¬Çë˵Ã÷ÀíÓÉ.
СÌâ1:a£½7,¡¡b£½1.4 ¡¡¡¡¡¡ ¡¡
СÌâ1:ÓÉÌâÒâÉèx>3ʱ£¬¡¡y1£½2.1x£«m
¡ßy1£½2.1x£«mµÄͼÏó¹ýµãF£¨3,6£©
¡¡¡¡¡¡¡¡¡¡¡¡¡à¡¡6£½2.1¡Á3£«m. M£½£0.3¡¡¡¡¡¡
¡¡¡¡¡¡¡¡¡¡¡¡¡à¡¡x>3ʱ£¬y1£½2.1x£0.3¡¡¡¡ º¯ÊýͼÏóÈçͼ.
СÌâ1:º¯Êýy1Óëy2µÄͼÏó´æÔÚ½»µã.¡¡
¡¡¡¡¡¡¡¡BCµÄº¯ÊýʽΪ¡¡y2£½1.4x£«2.8¡¡¡¡£¨x>3£©
½âµÃ
¡¡¡¡º¯Êýy1Óëy2µÄͼÏóµÄ½»µã½»µãΪ¡¡¡¡¡¡
¸ÃµãµÄʵ¼ÊÒâÒå±íʾÐÐʻ·³ÌΪ kmʱ£¬µ÷¼ÛÇ°ºóµÄÔ˼ÛÏàͬ.¡¡
СÌâ1:¿É½áºÏͼÏ󣬵¥¼Û=×ܼۡ·³Ì£¬b¡¢c±ã¿ÉÒÔÇó³ö£»
СÌâ1:ͼÏó¾¹ýµã£¨3£¬6£©Çұ仯¹æÂÉÊÇÿ¹«Àï2.1Ôª£»
СÌâ1:ͼÏóÔÚÏ·½£¬ËµÃ÷Ô˼۽ÏС£¬ÉÏ·½ËµÃ÷Ô˼۸ߣ®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿