Sn=1/1!+1/2!+1/3!+1/4!+……+1/n!+……
问题描述：
Sn=1/1!+1/2!+1/3!+1/4!+……+1/n!+……
n无穷大,
答
e=1/0!+1/1!+1/2!+1/3!+1/4!+……+1/n!+…… 所以1/1!+1/2!+1/3!+1/4!+……+1/n!+……=e-1