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1/6+1/66+1/176···+4034066/1的解
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1/6+1/66+1/176···+4034066/1的解
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1/6+1/66+1/176···+4034066/1
=(1-1/6+1/6-1/11+1/11-1/16+……+1/2006-1/2011)÷5
=(1-1/2011)÷5
=402/2011
=(1-1/6+1/6-1/11+1/11-1/16+……+1/2006-1/2011)÷5
=(1-1/2011)÷5
=402/2011
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