提出一个边际效用定义，征求批评

everybody may agree that we should tolerate novices, but more than everybody may feel sufferring when somebody is novicing like this.

以下是引用证毕在2005-1-20 20:51:17的发言： everybody may agree that we should tolerate novices, but more than everybody may feel sufferring when somebody is novicing like this.

Are you so confident ?

真是有点儿弱智

以下是引用lovis在2005-1-21 12:03:08的发言： 真是有点儿弱智

不屑未必意味着自己正确。请提出自己的意见。

离真理很接近了，就差一点点。
假设边际效用线性递减，有：
MU=2(X0-X)/X02(2是幂）
U=X(2X0-X)/X02（2是幂）
楼主的餍足量概念抓住了效用的本质。