(1-1/2008)+(1-1/2008×2)+(1-1/2008×3).+(1-1/2008×2008)计算

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(1-1/2008)+(1-1/2008×2)+(1-1/2008×3).+(1-1/2008×2008)计算
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(1-1/2008)+(1-1/2008×2)+(1-1/2008×3).+(1-1/2008×2008)计算
(1-1/2008)+(1-1/2008×2)+(1-1/2008×3).+(1-1/2008×2008)计算

(1-1/2008)+(1-1/2008×2)+(1-1/2008×3).+(1-1/2008×2008)计算
(1-1/2008)+(1-1/2008×2)+(1-1/2008×3).+(1-1/2008×2008)
=1×2008-(1/2008)×(1+2+3+...+2008)
=2008-(1/2008)×(2008×2009/2)
=2008-1004.5
=1003.5