證明不等式(中學題) 現有一組分數列是(1/10)^2+(1/11)^2+(1/12)^2+……+(1/1000)^2 試證明該數列是大於0.099且小於0.111的.

證明不等式(中學題) 現有一組分數列是(1/10)^2+(1/11)^2+(1/12)^2+……+(1/1000)^2 試證明該數列是大於0.099且小於0.111的.

[1/(10x10)+1/(11x11)+1/(12x12)+.+1(1000x1000)]>[1/(10x11)+1/(11x12)+1/(12x13)+.+1(1000x1001)]=(1/10)-(1/11)+(1/11)-(1/12)+.+(1/1000)-(1/1001)=(1/10)-(1/1001)=0.099[1/(10x10)+1/(11x11)+1/(12x12)+.+1(10…