1*2/1=1-2/1;2*3/1=2/1-3/1;3*4/1=3/1-4/1;...求和:1*2/1+2*3/1+3*4/1+...+2009*2010/1
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1*2/1=1-2/1;2*3/1=2/1-3/1;3*4/1=3/1-4/1;...求和:1*2/1+2*3/1+3*4/1+...+2009*2010/1
1*2/1=1-2/1;2*3/1=2/1-3/1;3*4/1=3/1-4/1;...求和:1*2/1+2*3/1+3*4/1+...+2009*2010/1
1*2/1=1-2/1;2*3/1=2/1-3/1;3*4/1=3/1-4/1;...求和:1*2/1+2*3/1+3*4/1+...+2009*2010/1
首先我想说你表达错了
应该是1/﹙1*2﹚=1-1/2;1/﹙2*3﹚=1/2-1/3;1/﹙3*4﹚=/3-1/4……
1/﹙1*2﹚+1/﹙2*3﹚+1/﹙3*4﹚+...+1/﹙2009*2010﹚
=1-1/2+1/2-1/3+1/3-1/4+……+1/2008-1/2009+1/2009-1/2010
=1-1/2010
=2009/2010
1+2=3?
1+2+1+2+1+2+1+2+1+2+1+2+1+2 =( )*( ) =()
1*1/2=?
1+1=2?
1+1=2?
1+1×2=?
2-1=1
1+2+3/2=?
1/2+1/3+1/4=?
1/2-3/1-4/1=
1+2+3```+(2n-1)=?
1+(1/1+2)+(1/1+2+3)+...+(1/1+2+3+...100)=?
1+2^1+2^2+2^3+.+2^2008=
1+1=?1+2=?1+3=?
1+(1/1+2)+(1/1+2+3)+(1/1+2+3+4)+(1/1+2+3+4+...+100)=?
1/1*2+1/2*3+...+1/2008*2009=
1+2+1+1+1+2+3+8=几
(1-1/2)+(1/2-1/3)+(1/3-1/4)+.+(1/1999-1/2000)=