xoooooo
ÉèÁ½²¿Ãž¼ÃµÄÏû·Ñ·½³ÌΪC=500+0.5Y,Ͷ×ʺ¯ÊýΪI=...
,h=250 m=1250/1ooo lm=(k/h)y-m/h=0.02y-0.oo5½âÎö¿´²»¶®?Ãâ·Ñ²é¿´Í¬ÀàÌâÊÓÆµ½âÎö²é¿´½â´ðÏàËÆÎÊÌâ ºê¹Û¾¼ÃѧislmÄ£ÐÍ:ÒÑÖªÏû·Ñº¯Êýc=300+0.75y,Ͷ×ʺ¯Êýi=1250-80r,»õ±ÒÐèÇóº¯Êýl=0.5y-100r¡¡¼Ù¶¨Ïû·Ñº¯ÊýΪc=50+0.7y,Ͷ×ʺ¯ÊýΪi=100-6r,ÇóisÇúÏß·½³Ì ×îºÃÊÇÓмÆËã²½Öè3x+5y=15 x