已知数列an满足an+1=nan,a1=2,求an通项
已知数列{an}满足An+1=2^nAn,且A1=1,则通项an
已知数列(an)满足a1+2a2+3a3+...+nan=n(n+1)(n+2)求an
已知数列{An}满足(n+1)an-nan+1=2,且a1=3.求an的通项公式,(2),求和:(a1+a2)+(a2+
已知数列{An}满足:A1=1,An=nAn-1+(n-1)!(n>=2),求数列{An}的通项公式.
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+2a2+3a3+……+nan=2^n,求an
数列an满足a1+2a2+3a3+...+nan=(n+1)(n+2) 求通项an
已知数列{an}满足:a1+2a2+3a3+...+nan=(2n-1)*3^n(n属于正整数)求数列{an}得通项公式
已知数列{an}满足a1=1,an+1-an=负2的n次方、分之1.(1)求数列{an}的通项公式,(2)求数列{nan
已知数列{an}满足a1=1,a2=3,an+2=3an+1-2an求an
已知数列an满足a1=1,1/an+1=根号1/an^2+2,an>0,求an
已知数列an满足a1=1/2 sn=n平方×an 求an