已知数列{an}满足a1=31,an=an-1-2（n大于等于2,n属于自然数）设bn=|an|,求数列{an}的前n项和T

已知数列{an}满足a(n+1)=an+n,a1=1,则an= 已知数列{an}满足a(n+1)=an+lg2,a1=1,求an 已知数列{an}满足a1=1 an+1=an/(3an+1) 则球an 已知数列an满足a1=1,a(n+1)=an/(3an+1) 求数列通项公式 已知数列an满足a1=1,a(n+1)=an/(3an+2),则an=? 已知数列an满足条件a1=-2 a（n+1）=2an/(1-an) 则an= 已知数列{an}满足a1=1,3a(n+1)+an-7 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=2an+3.5^n,a1=6.求an 已知数列{an}满足a1+a2+...+an=n²an求其通项an 已知数列满足a1=1/2,an+1=2an/(an+1),求a1,a2已知数列满足a1=1/2,a(n+1)=2an/(an+1),求a1,a2;证明0 数列题,求通项已知数列｛An}满足A=2An/(1-An),A1=2,求数列｛An}的通项公式 已知数列｛An｝满足a1=1,a（n+1）=2an+1 求证数列{an+1}是等比数列 求数列｛an｝通式 已知数列{an}满足a1=2,a(n+1)-an=a(n+1）*an,则a31=? 已知数列{an}中满足(An+1-An)(An+1+An)=16,且a1=1,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a1=5,a(n+1)=an+6n+6,则an= 已知数列{an}满足a1=2,an=a(n+1)-2,求an及S10