简算1/(5*8)+1/(8*11)+1/(11*14)+......+1/(95*98)+1/(98*101)=

日期:2022-04-11 06:44:58 人气:1

简算1/(5*8)+1/(8*11)+1/(11*14)+......+1/(95*98)+1/(98*101)=

1/5*8=1/3(1/5-1/8),同理可得:1/5*8+1/8*11+……+1/98*101=1/3(1/5-1/8+1/8-1/11+1/11-1/14+……+1/98-1/101)=1/3(1/5-1/101)=288/505
    A+
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