计算 |1/4-1/2|+|1/6-1/4|+|1/8—1/6|+.+|1/2008-1/2006|

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计算 |1/4-1/2|+|1/6-1/4|+|1/8—1/6|+.+|1/2008-1/2006|

计算 |1/4-1/2|+|1/6-1/4|+|1/8—1/6|+.+|1/2008-1/2006|
计算 |1/4-1/2|+|1/6-1/4|+|1/8—1/6|+.+|1/2008-1/2006|

计算 |1/4-1/2|+|1/6-1/4|+|1/8—1/6|+.+|1/2008-1/2006|
|1/4-1/2|+|1/6-1/4|+|1/8—1/6|+.+|1/2008-1/2006|
=1/2-1/4+1/4-1/6+1/6-1/8+...+1/2006-1/2008
=1/2-1/2008
=1003/2008