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1????????=1?????

2????????=1?????3??+3??????=6???

3????????=2?????3??+8??????=26???

4????????=3?????3??+15??????=93???

5????????=4?????3??+30??????=309???

6????????=5?????3??+60??????=987???

7????????=6?????3??+100??????=3061???

8????????=7?????3??+150??????=9333???

9????????=8?????3??+250??????=28249???

10????????=9?????3??+450??????=85197???

11????????=10?????3??+800??????=256391???(?????????????????г???)

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?????????????飬????????????????72-74%????????????????????????75%??????????????

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???????????????????????=1?????3??=3??????????=2?????1??=6???????0.75??????????=6??/3??X0.75=1.5

?????????????????????????=2?????3??=18??????????=3?????1??=26???????0.75??????????=26/18X0.75=1.08

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1?????2??Z=1.5 2?????3??Z=1.08 3?????4??Z=0.89 4?????5??Z=0.83 5?????6??Z=0.80 6?????7??Z=0.78 7?????8??Z=0.76

8?????9??Z=0.757 9?????10??Z=0.754 10?????11??Z=0.752 ??????????????4????????????ú????????ú???????????

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