3分之1+15分之1+35分之1加63分之1+99分之1=?
发布网友
发布时间:2024-01-07 03:31
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热心网友
时间:2024-10-27 20:37
1/3+1/15+1/35+1/63+1/99
=[1-(1/3)/2]+[(1/3-1/5)/2]+[(1/5-1/7)/2]+[(1/7-1/9)/2]+[(1/9-1/11)/2]
=(1-1/3+1/3-1/5+1/5-1/7+1/7-1/9+1/9-1/11)/2
=(1-1/11)/2
=(10/11)/2
=5/11
热心网友
时间:2024-10-27 20:42
11分之5
热心网友
时间:2024-10-27 20:41
1/3+1/15+1/35+1/63+1/99
=[1-(1/3)/2]+[(1/3-1/5)/2]+[(1/5-1/7)/2]+[(1/7-1/9)/2]+[(1/9-1/11)/2]
=(1-1/3+1/3-1/5+1/5-1/7+1/7-1/9+1/9-1/11)/2
=(1-1/11)/2
=(10/11)/2
=5/11
热心网友
时间:2024-10-27 20:39
11分之5