???????????????

????????? ??????

??????????

????1. ???1??2??4???Σ????1????????2???1????3???1????4???4???1??2????5???1????6???2???1?????????1

????2. ????????????????????????????е????

????3. ????????з???1??2??3??4????裬????????????????????ж????????????????

????4. ???????????????????10?????????????????????????1????????????????2???????????????????3??????

????5. ?????????1??2??5??10?????κ???????????????????10????

????6. ???????...*_*

????7. 012345 0126(9)78

?????????? ???????????

?????????97 0 1 2 0 ???? 97 0 1 0 2 (?????????????????)

?????????3????5??Σ??????

????ABC 3????????1/8????C??AB???????C??????1/4????B??A???????B??????A????1/2????C??????????????????3/4????C???????????A??????????????B?????????AC??7/8???B???????????????3??????????????????3????5??Ρ????????????????????

????(?????????????????????鷳????????????????????????)

?????????????????? an=500/(2n+1) n=0??1??2??3......???Sn???????????1000?????n> 6

??????n=6???S6=977.57

??????????????????????λ?t????1000-977.57=22.43????

??????????????????????? 22.43*(2*7+1)=336.50??

?????????????????500??

????????????????7*500+336.50=3836.50??

???????????????????????

????????????????????е??S???????????100?????n> 13

????????????????????￥???????14??27??39??50??60??69??77??84??90??95??99??100

??????????3??4(????????)

?????????????n1??n2??n1> =n2?????????????n=n1+n2?????????????m=n1*n2

???????n1=3??n2=4???

?????????????????????棬???????n=7

????1)??????

????i) n> 5 ???????????n <4???????n=4????n=5??????????????

????ii) n> 6 ??????n=6??????????????????(?????2+4????3+3)??????????2??4????3??3???????????????(m=8????m=9???????????????е????)

????iii) n <8 ??????n> =8??????????n???? n=4+x ?? n=6+(x-2)?????m??????4x???????6(x- 2)??4x=6(x-2)??????????x=6??n=10??????n????????8+2??????????? n> =8???n?????????????????????????????????????????????????????????????

?????????????????