两个颂肢绝对值互为相反和樱察数,可知他们都=0,可知ab=2,b=1即a=2,b=1原式就是=1/唤茄(1*2)+1/(2*3)+1/(3*4)+...+1/(3000*3001)=(1-1/2)+(1/2-1/3)+(1/3-1/4)+...+(1/3000-1/3001)=1-1/3001=3000/3001