e = (1+1/n) ^n, 当n趋向无穷大。早上刚看了网上的证明。

所有跟帖： 

• dy/dt=y, rich is getting richer due to e -coolboy- ♂ (0 bytes) () 06/26/2017 postreply 11:04:06

• dy/dt=-ky, k is real and k>0. -漂亮的九妹- ♀ (0 bytes) () 06/26/2017 postreply 11:19:20

• 败家的富二代or富三代？ -coolboy- ♂ (0 bytes) () 06/26/2017 postreply 11:35:25