1-1/2-1/6-1/6-1/12-1/20·······-1/99*100 咋写

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1-1/2-1/6-1/6-1/12-1/20·······-1/99*100咋写1-1/2-1/6-1/6-1/12-1/20·······-1/99*100咋写1-1/2-1/6-1/6-1/12

1-1/2-1/6-1/6-1/12-1/20·······-1/99*100 咋写
1-1/2-1/6-1/6-1/12-1/20·······-1/99*100 咋写

1-1/2-1/6-1/6-1/12-1/20·······-1/99*100 咋写
1-1/2-1/6-1/12-1/20·······-1/99*100
=1-(1/2+1/6+1/12+1/20·······+1/99*100)
=1-(1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+······+1/99-1/100)
=1-(1-1/100)
=1-99/100
=1/100