问题描述:
观察下面的变形规律1/(1×2)=1-1/2;1/(2×3)=1/2-1/3;1/(3×4)=1/3-1/4.
求
1/(1×2)+1/(2×3)+1/(3×4)+……+1/(2011×2012)·
求
1/(1×2)+1/(2×3)+1/(3×4)+……+1/(2011×2012)·
问题解答:
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