1/(1994+1995)+1/(1995+1996)+1/(1996+1997)+1/1997

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1/(1994+1995)+1/(1995+1996)+1/(1996+1997)+1/19971/(1994+1995)+1/(1995+1996)+1/(1996+1997)+1/19971/(1

1/(1994+1995)+1/(1995+1996)+1/(1996+1997)+1/1997
1/(1994+1995)+1/(1995+1996)+1/(1996+1997)+1/1997

1/(1994+1995)+1/(1995+1996)+1/(1996+1997)+1/1997
题目没错?
如果是1/(1995*1996)+1/(1996*1997)+1/1997
那么=1/1994
1/(1994*1995)=1/1994-1/1995
……
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