数列an满足a1=2an+1=2n+1an/【(n+1/2)an+1+2n】（1）bn=2n/an求bn通向（2）设cn=1/n（n+1）an+1（底n+1项求数列cn的前n项和sn并由此证明5/16≤sn＜1/2

数列{an}满足a1=2,a(n+1)=2an+n+2,求an 数列{An}满足a1=1/2,a1+a2+..+an=n方an,求an 数列an满足a1=1,a(n+1)=an/[(2an)+1],求a2010 数列[An]满足a1=2,a（n+1）=3an-2 求an 数列{an}满足a1=1 an+1=2n+1an/an+2n 数列｛an｝满足a1=1,且an=an-1+3n-2,求an 已知数列{an}满足an+1=2an+3.5^n,a1=6.求an 已知数列an满足条件a1=-2 a（n+1）=2an/(1-an) 则an= 已知数列an满足a1=1,a(n+1)=an/(3an+2),则an=? 已知数列an满足a1=2,an=a(n-1)+2n,（n≥2）,求an 已知数列an满足:a1=1,an-a(n-1)=n n大于等于2 求an 已知数列{an}满足a1=33,a(n+1)-an=2n,则an/n的最小值 已知数列{an}满足a1=33,a（n+1）-an=2n,求an/n的最小值 已知数列an满足a1=100,a(n+1)-an=2n,则(an)/n的最小值为 数列{an}满足a1=2,a(n+1)=-1/(an+1),则a2010等于 数列an满足a1=1/3,Sn=n(2n-1)an,求an 数列｛an｝满足a1=3,a n+1=2an,则a4等于 已知数列{an}满足a1=2,a(n+1)-an=a(n+1）*an,则a31=?