若sn=n!(1/2!+2/3!+……+n/n+1!-1)则s2013=

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若sn=n!(1/2!+2/3!+……+n/n+1!-1)则s2013=若sn=n!(1/2!+2/3!+……+n/n+1!-1)则s2013=若sn=n!(1/2!+2/3!+……+n/n+1!-1

若sn=n!(1/2!+2/3!+……+n/n+1!-1)则s2013=
若sn=n!(1/2!+2/3!+……+n/n+1!-1)则s2013=

若sn=n!(1/2!+2/3!+……+n/n+1!-1)则s2013=
做出来了吗?