ÌâÄ¿ÄÚÈÝ

ij¹¤³§Éú²úÒ»ÖÖ²úÆ·µÄÔ­²ÄÁÏ·ÑΪÿ¼þ40Ôª£¬ÈôÓÃx±íʾ¸Ã³§Éú²úÕâÖÖ²úÆ·µÄ×ܼþÊý£¬ÔòµçÁ¦Óë»úÆ÷±£ÑøµÈ·ÑÓÃΪÿ¼þ0.05xÔª£¬Óָó§Ö°¹¤¹¤×ʹ̶¨Ö§³ö12500Ôª£®
(1)°Ñÿ¼þ²úÆ·µÄ³É±¾·ÑP(x)(Ôª)±íʾ³É²úÆ·¼þÊýxµÄº¯Êý£¬²¢Çóÿ¼þ²úÆ·µÄ×îµÍ³É±¾·Ñ£»
(2)Èç¹û¸Ã³§Éú²úµÄÕâÖÖ²úÆ·µÄÊýÁ¿x²»³¬¹ý3000¼þ£¬ÇÒ²úÆ·ÄÜÈ«²¿ÏúÊÛ£¬¸ù¾ÝÊг¡µ÷²é£ºÃ¿¼þ²úÆ·µÄÏúÊÛ¼ÛQ(x)Óë²úÆ·¼þÊýxÓÐÈçϹØϵ£ºQ(x)£½170£­0.05x£¬ÊÔÎÊÉú²ú¶àÉÙ¼þ²úƷʱ£¬×ÜÀûÈó×î¸ß£¿(×ÜÀûÈó£½×ÜÏúÊ۶×ܳɱ¾)
£¨1£©P(x)£½£«40£«0.05x£¬Ã¿¼þ²úÆ·³É±¾µÄ×îСֵΪ90Ôª
£¨2£©Éú²ú650¼þ²úƷʱ£¬×ÜÀûÈó×î¸ß£¬×î¸ß×ÜÀûÈóΪ29750Ôª
½â£º(1)P(x)£½£«40£«0.05x£¬
ÓÉ»ù±¾²»µÈʽµÃ
P(x)¡Ý2£«40£½90.
µ±ÇÒ½öµ±£½0.05x£¬¼´x£½500ʱ£¬µÈºÅ³ÉÁ¢£®
¡àP(x)£½£«40£«0.05x£¬Ã¿¼þ²úÆ·³É±¾µÄ×îСֵΪ90Ôª£®
(2)Éè×ÜÀûÈóΪyÔª£¬Ôò
y£½xQ(x)£­xP(x)£½£­0.1x2£«130x£­12500£½£­0.1(x£­650)2£«29750.
µ±x£½650ʱ£¬ymax£½29750.
´ð£ºÉú²ú650¼þ²úƷʱ£¬×ÜÀûÈó×î¸ß£¬×î¸ß×ÜÀûÈóΪ29750Ôª£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com

¾«Ó¢¼Ò½ÌÍø