8⼀1+24⼀1+48⼀1......2400⼀1简便计算

2025-06-22 13:52:36
推荐回答(2个)
回答1:

解:
1/8+1/24+1/48+……+1/2400
=1/4(1/2+1/2*3+1/3*4+...+1/24*25)
=1/4(1-1/2+1/2-1/3+1/3-1/4+...+1/24-1/25)
=1/4(1-1/25)
=(1/4)(24/25)
=6/25

回答2:

大姐,你分子分母写反了吧