已知数列an满足a1=1,an=-2[n-(-1)^n],求S10 和S99

已知数列{an}满足an+1=2an+3.5^n,a1=6.求an 已知数列{an}满足a1=1,an+1·an=2^n 则s2012 已知数列{an}满足a1=1/2,sn=n^2an,求通项an 已知数列an满足an=1+2+...+n,且1/a1+1/a2+...+1/an 已知数列{an},满足a1=1/2,Sn=n²×an,求an 已知数列an满足a1=1/2 sn=n平方×an 求an 已知数列An满足 A1=1/2 Sn=N²An 求An 已知数列an满足a1=1 Sn=2an+n 求an 已知数列{An}满足A1=1,An+1=2An+2^n.求证数列An/2是等差数列 数列{An}满足a1=1/2,a1+a2+..+an=n方an,求an 几个数列问题.已知数列{an} a1=1,an+1=an/(1+n^2*an) 求an 已知数列{an} 满足a1=1 a1*a2*a3.*an=n^2 求an 已知数列{an}满足an+1=an+n,a1等于1,则an=? 已知数列an满足an+1/an=n+2/n且a1=1,则an= 已知数列{an}满足a1=1/2,an+1=an+1/n的平方+n求an 已知数列an满足a1=1/2,an+1=an+1/n²+n,求an 已知数列{an}满足a1=33,an+1-an=2n 则求an/n的最小值 已知数列{an}满足a1=33,an+1-an=2n 则求an/n? 已知数列an满足a1=33 an+1 -an=2n 则an/n的最小值是?