设b>0,数列满足a1=b,an=[nba(n-1)]/[a(n-1)+2n-2](n≥2)(1)求数列{an}的通项公式;(2)证明:...
设b>0,数列满足a1=b,an=[nba(n-1)]/[a(n-1)+2n-2](n≥2)
(1)求数列{an}的通项公式;
(2)证明:对于一切正整数n,an≤b^(n+1)/2^(n+1)≤1