数列{an}满足a1=1,且an=an-1+3n-2,求an
数列{an}满足a1=1,且an=an-1+3n-2,求an
已知数列{an}满足a(n+1)=an+3n+2,且a1=2,求an=?
在数列an中,a1=1,且满足a(n+1)=3an +2n,求an
已知数列an满足a(n+1)=an+3n+2,且a1=2,求an
已知数列{an}满足an+1=2an+3.5^n,a1=6.求an
设数列{an}满足an+1/an=n+2/n+1,且a1=2
已知数列an满足:an+1-2an=2^n+1,且a1=2 (1)证明{an/2^n}是等差数列 (2)求数列an的
数列{an}满足a1=1,an=3n+2an-1(n≥2)求an
已知数列{an}满足:a1=1,且an-an-1=2n,求(1)a2,a3,a4.(2)求数列{an}的通项an
已知数列an满足an=1+2+...+n,且1/a1+1/a2+...+1/an
已知数列{an}的首项a1=1,且{an}满足an=n(n+an-1),其中n大于等于2,求{an}的通项
已知数列{an}a1=2前n项和为Sn 且满足Sn Sn-1=3an 求数列{an}的通项公式an