图像与坐标轴的交点为(1/k,0),(0,1/(1+k))
S=(1/2)*(1/k)*(1/(1+k))=1/(2k(1+k))=(1/2)*[1/k-1/(1+k)]
故S1=(1/2)*(1/1-1/2)
S2=(1/2)*(1/2-1/3)
S3=(1/2)*(1/3-1/4)
S2010=(1/2)*(1/2010-1/2011)
故S1+S2+S3+.+S2010=(1/2)*[1-1/2+1/2-1/3+1/3-1/4+.+1/2010-1/2011]=(1/2)*(1-1/2011)=1005/2011