ÌâÄ¿ÄÚÈÝ
£¨18·Ö£©ÈçͼËùʾ£¬ÔÚy>0µÄ¿Õ¼äÖдæÔÚÔÈÇ¿µç³¡£¬³¡Ç¿ÑØyÖḺ·½Ïò£»ÔÚy<0µÄ¿Õ¼äÖУ¬´æÔÚÔÈÇ¿´Å³¡£¬´Å³¡·½Ïò´¹Ö±xyƽÃ棨ֽÃ棩ÏòÀï.Ò»µçÁ¿Îªq¡¢ÖÊÁ¿ÎªmµÄ´øÕýµçµÄÔ˶¯Á£×Ó£¬¾¹ýyÖáÉÏy=h´¦µÄµãP1ʱËÙÂÊΪV0£¬·½ÏòÑØxÖáÕý·½Ïò£»È»ºó£¬¾¹ýxÖáÉÏx=2h´¦µÄP2µã½øÈë´Å³¡£¬²¢¾¹ýyÖáÉÏy=£2h´¦µÄP3µã.²»¼ÆÖØÁ¦.Çó£º
£¨1£©µç³¡Ç¿¶ÈµÄ´óС.
£¨2£©Á£×Óµ½´ïP2ʱËٶȵĴóСºÍ·½Ïò.
£¨3£©´Å¸ÐӦǿ¶ÈµÄ´óС.
£¨1£©£¨2£©£¬¦È=450£¨3£©
½âÎö
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿