已知数列an,a1=1,an+2a（n+1）+6n+4=0,若bn=an+2n,（1）求证bn是等比数列（2）求数列an的通项公式

已知数列｛an｝中,a(n+1)=an+2^n,a1=3,求an 已知数列{an},A1=1 A(n+1)=2an/an+2 求a5 已知数列an满足条件a1=-2 a（n+1）=2an/(1-an) 则an= 已知数列｛an｝中a1=1/2,a(n+1)=(2an)/(4an+3),求an. 已知数列an满足a1=1,a(n+1)=an/(3an+2),则an=? 已知数列{an},a1=1,a(n+1)=an^2+an+1,求通项公式an 已知数列{An}中,A1=1,A(n+1)=An/(1+2An),求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a(n+1)=an+n,a1=1,则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}中a1=1.且A(n+1)=6n*2^n-An.求通项公试An 已知数列an满足a1=100,a(n+1)-an=2n,则(an)/n的最小值为 已知数列an,a1=1 an+1-an=2的n次幂求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a1=2,a(n+1)-an=a(n+1）*an,则a31=? 已知数列｛an｝满足a(n+1)=an+3n+2,且a1=2,求an=?