x=4时 ,16a-16-6a=-1 10a=15 a=1.5
x=-5时 ,A=25*1.5+20-6*1.5=48.5
x[1/(1*2)+1/(2*3).+1/(2010*2011)]=2010
x[(1/1-1/2)+(1/2-1/3).+(1/2010-1/2011)]=2010
x(1-1/2+1/2-1/3+.-1/2010+1/2010-1/2011)=2010
x(1-1/2011)=2010
2010x/2011=2010
x=2011
x=4时 ,16a-16-6a=-1 10a=15 a=1.5
x=-5时 ,A=25*1.5+20-6*1.5=48.5
x[1/(1*2)+1/(2*3).+1/(2010*2011)]=2010
x[(1/1-1/2)+(1/2-1/3).+(1/2010-1/2011)]=2010
x(1-1/2+1/2-1/3+.-1/2010+1/2010-1/2011)=2010
x(1-1/2011)=2010
2010x/2011=2010
x=2011