数列{an}满足an=n(n+1)^2,是否存在等差数列{bn}使an=1*b1+2*b2+3*b3+...n*bn,对于一切正整数恒成立,并证明

数列{an}满足a1=1 an+1=2n+1an/an+2n 数列{an}满足a1=2,a(n+1)=2an+n+2,求an 数列an满足a1=1/3,Sn=n(2n-1)an,求an 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 数列{An}满足a1=1/2,a1+a2+..+an=n方an,求an 已知数列{an}满足a1=1,an=(an-1)/3an-1+1,(n>=2,n属于N*),求数列{an}的通项公式 数列an满足,a1=1/4,a2=3/4,an+1=2an-an-1(n≥2,n属于N*),数列bn满足b1 数列｛an｝满足an+1=1/（2-an）,用a1,n(n>2)表示an=? 数列{an}满足a1=1,an=3n+2an-1(n≥2)求an 已知数列an满足an+1/an=n+2/n且a1=1,则an= 已知数列{an}满足a1=1/2,an+1=an+1/n的平方+n求an 已知数列an满足a1=1/2,an+1=an+1/n²+n,求an 数列{an}满足an+1+(-1)^n an=2n-1,则{an}的前60项之和是多少 已知数列{an}满足a1=33,an+1-an=2n 则求an/n的最小值 已知数列{an}满足a1=33,an+1-an=2n 则求an/n? 已知数列an满足a1=33 an+1 -an=2n 则an/n的最小值是? 已知数列{an}满足a1=33,an+1-an=2n,则an/n的最小值为