1/(4)=1/4
1/(4Ã7)=(1/3)Ã[1/4ï¼1/7]
1/(7Ã10)=(1/3)Ã[1/7ï¼1/10]
1/(10Ã13)=(1/3)Ã[1/10ï¼1/13]
1/(13Ã14)=(1/3)Ã[1/13ï¼1/16]
ååå¼=(1/4)ï¼(1/3)Ã[(1/4)ï¼(1/7)ï¼(1/7)ï¼(1/10)ï¼(1/10)ï¼(1/13)ï¼(1/13)ï¼(1/16)]
=(1/4)ï¼(1/3)Ã[(1/4)ï¼(1/16)]
=(1/4)ï¼(1/3)Ã(3/16)
=5/16æ¥èªï¼æ±å©å¾å°çåç
温馨提示:内容为网友见解,仅供参考