=(1-1/2)+(1/2-1/3)+(1/3-1/4)+...(1/2007-1/2008)+(1/2008-1/2009)+(1/2009-1/2010)
=1-1/2010
=2009/2010
"1*2/1+2*3/1+3*4/1+.+2007*2008/1+2008*2009/1+2009*2010/1"這道題怎么做,
"1*2/1+2*3/1+3*4/1+.+2007*2008/1+2008*2009/1+2009*2010/1"這道題怎么做,
數(shù)學(xué)人氣:415 ℃時間:2019-10-23 04:51:13
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