a1=5/2 a(n+1)=an/2+2/an ⑴求证：2

数列{an}满足a1=2,a(n+1)=2an+n+2,求an 数列{an},a1=3,an*a(n+1)=(1/2)^n,求an 已知数列｛an｝中,a(n+1)=an+2^n,a1=3,求an 写出下列数列{an}的前5项 a1=1,a(n+1)=an+3 a1=2,a(n+1)=2an a1=3,a2=6,a(n+2)=a(n+1)-an a1=1,a(n+1)=2an+n^2+2n +2 求an 已知a1=2 a(n+1)=2an+2^n+3^n 求an A1=1,A(n+1)/An=(n+2)/n,求An? 1.a1=1 an=a1+2a2+.(n-1)an-1求an2.an+a（n+1）=1/2,a1=1,求an 数列{an}中,a1=1/2,a(n+1)-5an=5^n,求an求解答过程 1.a1=3 且 a（n+1）=an+5ana（n+1）2.a1=1 且 a（n+1）=an+2n+13.a1=1 且 a（n+1）=an+1/4n^2-14.a1=1 an=n+1/n*a（n+1）求各题的an a1=2,a(n+1)=an^2求通项 2an+a(n-1)=3,a1=2 an=a1+(n-1)d 和Sn=n(a1+an)/2中an是什么意思? an=a1+(n-1)d 和Sn=n(a1+an)/2中an是什么 a1=5/2 a(n+1)=an/2+2/an ⑴求证：2 a1=5,且2a(n+1)=-3an,则an=? 数列首项a1=3/5,an=2-1/a(n-1),求an 数列{an}=3a(n-1)+5,a1=2,求an