已知数列的首项a1=3/5,a(n+1)=(3an)/(2an + 1 ),n=1,2……已知数列的首项a1=3/5,a(n+1)=(3an)/(2an + 1 ),n=1,2…… (1)求an (2)求证:X>0时,an>=1/(1+x)-1/[(1+x)^2]*[2/(3^n)-x],n=1,3…… (3)求证:a1+a2+a3+……+an>
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/21 02:58:10
![已知数列的首项a1=3/5,a(n+1)=(3an)/(2an + 1 ),n=1,2……已知数列的首项a1=3/5,a(n+1)=(3an)/(2an + 1 ),n=1,2…… (1)求an (2)求证:X>0时,an>=1/(1+x)-1/[(1+x)^2]*[2/(3^n)-x],n=1,3…… (3)求证:a1+a2+a3+……+an>](/uploads/image/z/13261985-17-5.jpg?t=%E5%B7%B2%E7%9F%A5%E6%95%B0%E5%88%97%E7%9A%84%E9%A6%96%E9%A1%B9a1%3D3%2F5%2Ca%28n%2B1%29%3D%283an%29%2F%282an+%2B+1+%29%2Cn%3D1%2C2%E2%80%A6%E2%80%A6%E5%B7%B2%E7%9F%A5%E6%95%B0%E5%88%97%E7%9A%84%E9%A6%96%E9%A1%B9a1%3D3%2F5%EF%BC%8Ca%28n%2B1%29%3D%283an%29%2F%282an+%2B+1+%29%2Cn%3D1%2C2%E2%80%A6%E2%80%A6+%EF%BC%881%29%E6%B1%82an+%282%29%E6%B1%82%E8%AF%81%EF%BC%9AX%3E0%E6%97%B6%EF%BC%8Can%3E%3D1%2F%281%2Bx%29-1%2F%5B%281%2Bx%29%5E2%5D%2A%5B2%2F%283%5En%29-x%5D%EF%BC%8Cn%EF%BC%9D1%EF%BC%8C3%E2%80%A6%E2%80%A6+%EF%BC%883%EF%BC%89%E6%B1%82%E8%AF%81%EF%BC%9Aa1%2Ba2%2Ba3%2B%E2%80%A6%E2%80%A6%2Ban%3E)
xJ@_%Ĥ[_C(-X^zlEl`-B~x6F|MS^Im{;3'ZϏ۞{9:W~gfb]E{)RKTB"1 Xc~8
BNN )pcn)dPCHrVJ`6iI$i*%)UT5pJeȦ*ykzaV[t㋿ ֆ
^MG,rU؆D^1t