ÌâÄ¿ÄÚÈÝ
ΪÁËÔ¤·ÀÁ÷¸Ð£¬Ä³Ñ§Ð£ÔÚÐÇÆÚÌìÓÃҩѬÏû¶¾·¨¶Ô½ÌÊÒ½øÐÐÏû¶¾¡£ÒÑÖªÒ©ÎïÊͷŹý³ÌÖУ¬ÊÒÄÚÿÁ¢·½Ã׿ÕÆøÖеĺ¬Ò©Á¿y£¨ºÁ¿Ë£©Óëʱ¼äx£¨·Ö£©³ÉÕý±ÈÀý£»Ò©ÎïÊÍ·ÅÍê±Ïºó£¬yÓëx³É·´±ÈÀý£¬ÈçͼËùʾ£¬¸ù¾ÝͼÖÐÌṩµÄÐÅÏ¢£¬½â´ðÏÂÁÐÎÊÌ⣺
£¨1£©Ð´³ö´ÓÒ©ÎïÊÍ·Å¿ªÊ¼£¬yÓëxÖ®¼äµÄÁ½¸öº¯Êý¹Øϵʽ¼°ÏàÓ¦µÄ×Ô±äÁ¿È¡Öµ·¶Î§£»
£¨2£©¾Ý²â¶¨£¬µ±¿ÕÆøÖÐÿÁ¢·½Ã׵ĺ¬Ò©Á¿½µµÍµ½0.45ºÁ¿ËÒÔÏÂʱ£¬Ñ§Éú·½¿É½øÈë½ÌÊÒ£¬ÄÇô´ÓÒ©ÎïÊÍ·Å¿ªÊ¼£¬ÖÁÉÙÐèÒª¾¹ý¶àÉÙСʱ£¬Ñ§Éú²ÅÄܽøÈë½ÌÊÒ£¿
£¨2£©¾Ý²â¶¨£¬µ±¿ÕÆøÖÐÿÁ¢·½Ã׵ĺ¬Ò©Á¿½µµÍµ½0.45ºÁ¿ËÒÔÏÂʱ£¬Ñ§Éú·½¿É½øÈë½ÌÊÒ£¬ÄÇô´ÓÒ©ÎïÊÍ·Å¿ªÊ¼£¬ÖÁÉÙÐèÒª¾¹ý¶àÉÙСʱ£¬Ñ§Éú²ÅÄܽøÈë½ÌÊÒ£¿
½â£º£¨1£©ÔÚÒ©ÎïÊͷŹý³ÌÖÐyÓëxµÄº¯Êý¹ØϵʽΪy=x£¨0¡Üx¡Ü12£©£¬Ò©ÎïÊÍ·ÅÍê±ÏºóyÓëxµÄº¯Êý¹ØϵʽΪy=£¨x¡Ý12£©£»
£¨2£©ÓÉÌâÒâ=0.45£¬½âµÃx=240
ÒòΪ240·Ö=4ʱ£¬ËùÒÔÖÁÉÙÐèÒª¾¹ý4Сʱ£¬Ñ§Éú²ÅÄܽøÈë½ÌÊÒ¡£
£¨2£©ÓÉÌâÒâ=0.45£¬½âµÃx=240
ÒòΪ240·Ö=4ʱ£¬ËùÒÔÖÁÉÙÐèÒª¾¹ý4Сʱ£¬Ñ§Éú²ÅÄܽøÈë½ÌÊÒ¡£
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿