1.{an}是等差数列,{bn}是各项都为正数的等比数列,且a1=b1=1,a3+a5=21,a5+b3=13,求{an}{bn}的通项公式.2.求数列1,1/2,1/2,1/3,1/3,1/3,1/4,1/4,1/4,1/4,前100项的和.1应该是:.{an}是等差数列,{bn}是各项都为正数的
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/11 14:13:59
![1.{an}是等差数列,{bn}是各项都为正数的等比数列,且a1=b1=1,a3+a5=21,a5+b3=13,求{an}{bn}的通项公式.2.求数列1,1/2,1/2,1/3,1/3,1/3,1/4,1/4,1/4,1/4,前100项的和.1应该是:.{an}是等差数列,{bn}是各项都为正数的](/uploads/image/z/3167511-15-1.jpg?t=1.%7Ban%7D%E6%98%AF%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%2C%7Bbn%7D%E6%98%AF%E5%90%84%E9%A1%B9%E9%83%BD%E4%B8%BA%E6%AD%A3%E6%95%B0%E7%9A%84%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97%2C%E4%B8%94a1%3Db1%3D1%2Ca3%2Ba5%3D21%2Ca5%2Bb3%3D13%2C%E6%B1%82%7Ban%7D%7Bbn%7D%E7%9A%84%E9%80%9A%E9%A1%B9%E5%85%AC%E5%BC%8F.2.%E6%B1%82%E6%95%B0%E5%88%971%2C1%2F2%2C1%2F2%2C1%2F3%2C1%2F3%2C1%2F3%2C1%2F4%2C1%2F4%2C1%2F4%2C1%2F4%2C%E5%89%8D100%E9%A1%B9%E7%9A%84%E5%92%8C.1%E5%BA%94%E8%AF%A5%E6%98%AF%EF%BC%9A.%7Ban%7D%E6%98%AF%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%EF%BC%8C%7Bbn%7D%E6%98%AF%E5%90%84%E9%A1%B9%E9%83%BD%E4%B8%BA%E6%AD%A3%E6%95%B0%E7%9A%84)
xSMoA+sw,K# CM 7T `RJMm-RqgvԿ3kI0yw6WSmh?}Ǜ4TơS
`;_`Ɖ[DUiaRJ3VlW6PThclk`ԃT7^97_Ѝ
4@'Q oun߱ȕ|8
D)*1N%I1+bN=
N Wy1DiTEpU(:H}0D*zu`^ZBc4+ZXmǟ^mFɲZVh^wjloR@3
hd̶4(cD}RBs :P\#(#^B&lnK,(yh)F "8Ȱ@U$Jдwd<{4D?>sw<=OأM07a+4Ľ: