& O3 J* e: X* q" cd [(a+bx)c ] /dx = -kc +s ! u' | @8 m* W5 I3 _9 a3 A1 D
where: only x and c are unknown, others are all known, requiire c = function of x, what is this function?& v: ~3 P4 Q0 d6 S( x, F
+ H. J/ n8 |0 b4 c2 Y
多谢了! + D# A! D5 u5 N G. }9 W4 T* ]' i; `* N[ 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 0 H- a4 t) I4 F3 yd [(a+bx)c ] /dx = -kc +s' i5 s- F- t' g
where: only x and c are unknown, others are all known, requiire c = function of x, what is this function? 2 E/ L- `3 d: [3 K5 U9 X3 t这道题难倒了我们全班的人,请赐教!! b$ ?; e8 V( C: D1 x7 }* o' o
多谢!% z* t H& y' j! [0 U9 }1 V" ]
# ~- D; k* P8 Y) o' r* H* g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!% }+ b: U# q# [6 [; {: k
3 v9 W. e3 U4 J[ Last edited by 醉酒当歌 on 2005-4-4 at 11:32 AM ]