1/(1*3)+1/(2*4)+1/(3*5)+……+1/(98*100)+1/(99*101)=?

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1/(1*3)+1/(2*4)+1/(3*5)+……+1/(98*100)+1/(99*101)=?
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1/(1*3)+1/(2*4)+1/(3*5)+……+1/(98*100)+1/(99*101)=?
1/(1*3)+1/(2*4)+1/(3*5)+……+1/(98*100)+1/(99*101)=?

1/(1*3)+1/(2*4)+1/(3*5)+……+1/(98*100)+1/(99*101)=?
裂项即可,1/(1*3)可写成1/2(1-1/3),1/(2*4)可写成1/2(12-1/4),1/(3*5)1/2(1/3-1/5),依此类推,最后全部裂项即可求解.