; j5 G* P3 z- md [(a+bx)c ] /dx = -kc +s * f) a% I$ K; V+ D J5 T$ cwhere: only x and c are unknown, others are all known, requiire c = function of x, what is this function? 8 X; v, `6 h8 i) h/ Q9 |# O2 C1 {/ a: v; m- D+ F8 j0 O4 W. @
多谢了!% x3 w. _: J7 B( V/ F
3 ?8 A/ F6 f' G3 u/ f! h; j* I3 q# g[ Last edited by 醉酒当歌 on 2005-4-4 at 11:34 AM ]
对不起,原题贴错了,怪不得这么多高手进来了。原题应该是 2 X3 K9 P1 E3 d3 }6 l5 n* e" fd [(a+bx)c ] /dx = -kc +s - x* G r$ u% b5 x* Uwhere: only x and c are unknown, others are all known, requiire c = function of x, what is this function?; s# W6 _% Y" u+ L; H
这道题难倒了我们全班的人,请赐教!! L2 ^$ j; f, A
多谢!' V- [8 t9 _! t( R2 @4 Y- b
\. Q1 V# n8 H5 R2 Q/ f8 Z要求用x的函数来表达c.也就是等式右边不能包含c. 即 c = x 的函数, 所求就是这个函数。多谢!/ {& p( l) q$ t" `1 s# f
! e. r( E @: d2 u& p[ Last edited by 醉酒当歌 on 2005-4-4 at 11:32 AM ]