1⼀2+1⼀6+1⼀12+1⼀20+1⼀30+…+1⼀9900

1/2+1/6+1/12+1/20+1/30+…+1/9900
2024-12-12 23:43:24
推荐回答(4个)
回答1:

1/2=1-1/2
1/6=1/2-1/3
1/12=1/3-1/4
……
1/9900=1/99-1/100
所以,
原式=(1-1/2)+(1/2-1/3)+(1/3-1/4)+……+(1/99-1/100)
=1-1/100
=99/100

回答2:

1/2+1/6+1/12+1/20+1/30+…+1/9900
=1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+....+1/99-1/100
=1-1/100
=99/100

回答3:

有谁给讲一下

回答4:

斯柯达热了热卡萨帝测热JS路脸色差爹来PK拉低被DJ