|ab-2|+(1-b)^2 =0,试求1/ab+1/(a+1)*(b+1)+
1/(a+2)*(b+2)+.+1/(a+2008)*(b+2008)
因为:|ab-2|+(1-b)^2 =0
所以:ab-2=0 (1-b)^2 =0
解方程组得:a=2,b=1.代入原式得:
1/1*2+1/2*3+1/3*4+.+1/(2009)*(2010)
=1-1/2+1/2-1/3+1/3-1/4+.-1/2009+1/2009-1/2010
=1-1/2010
=2009/2010
|ab-2|+(1-b)^2 =0,试求1/ab+1/(a+1)*(b+1)+
1/(a+2)*(b+2)+.+1/(a+2008)*(b+2008)
因为:|ab-2|+(1-b)^2 =0
所以:ab-2=0 (1-b)^2 =0
解方程组得:a=2,b=1.代入原式得:
1/1*2+1/2*3+1/3*4+.+1/(2009)*(2010)
=1-1/2+1/2-1/3+1/3-1/4+.-1/2009+1/2009-1/2010
=1-1/2010
=2009/2010