|1⼀10-1⼀11|+|1⼀11-1⼀12|+....+|1⼀99-1⼀100|=?请写一下步骤,谢谢啦

2025-06-22 20:30:00
推荐回答(2个)
回答1:

由于|1/n-1/(n+1)|=1/n-1/(n+1),n大于0.
故原式=1/10-1/11+1/11-1/12+......+1/98-1/99+1/99-1/100=1/10-1/100=9/100

回答2:

|1/10-1/11|+|1/11-1/12|+....+|1/99-1/100|
=1/10-1/11+1/11-1/12+……+1/99-1/100
=1/10-1/100
=10/100-1/100
=9/100