" |* k& L9 Z8 k: a3 _d [(a+bx)c ] /dx = -kc +s % ]' {% M+ E7 \4 W2 swhere: only x and c are unknown, others are all known, requiire c = function of x, what is this function?7 {) Z, L# m4 I1 j- }6 l% v
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多谢了! D7 N& [% h0 R0 @& G) I8 [, V" H p3 X" I$ @* T6 t ~9 r. ~
[ 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 $ C. v/ [( m( ~d [(a+bx)c ] /dx = -kc +s; @" p$ V9 ^4 n
where: only x and c are unknown, others are all known, requiire c = function of x, what is this function?# D6 i( R/ w f: \7 O( x
这道题难倒了我们全班的人,请赐教!6 k3 _7 ]0 P' d* g% e, A
多谢! . z: \3 b. O9 f7 F% b 8 c2 V$ X" W/ P1 p, G4 Z' 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! . u" ?: X u( }7 A % b: F- S) l3 \[ Last edited by 醉酒当歌 on 2005-4-4 at 11:32 AM ]