数列an满足a1=1/4,a2=1/5,且a1a2+a2a3+...+anan+1数列{an}满足a1=1/4,a2=1/5,且a1a2+a2a3+…+anan+1=na1an+1对于任何正整数n都成立,则1/a1+1/a2+...+1/a97的值为

数列{An}满足a1=1/2,a1+a2+..+an=n方an,求an 若数列{an}满足a1=1,a2=5且an+2=an+1-an,求a2000 已知数列an满足an=1+2+...+n,且1/a1+1/a2+...+1/an 设数列{an}满足lg(1+a1+a2+...+an)=n+1,求通项公式an 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 已知数列{An}满足a1=1,a2=5,an+1=5an-4an-1,（n≥2）,求an 数列an满足a1=1/2,a1+a2+a3……an=n^2an,则an 已知数列{an}满足条件:a1=5,an=a1+a2+...a(n-1) n大于等于2,求数列{an}的通项公式 已知数列an'满足a1=1/2,a1+a2+a3+...+an=n^2an,求通项公式 设数列AN满足A1等于1,3(A1+a2+~+AN)=(n+2)an,求通向公式 已知数列{an}满足关系式lg（1+a1+a2+.+an）=n,求数列{an}的通项公式 已知数列{an}满足a1=1,a2=3,an+2=3an+1-2an求an 已知数列满足a1=1/2,an+1=2an/(an+1),求a1,a2已知数列满足a1=1/2,a(n+1)=2an/(an+1),求a1,a2;证明0 数列An,满足An=An-1 + An-2,其中,A1=1,A2=1,求通项公式. 已知数列an满足a1=0 a2=1 an=(An-1+An-2)/2 求liman 已知数列an满足a1=0 a2=1 an=(An-1+An-2)/2 求liman 已知数列an满足a1=1,a2=3,an+1.an-1=an,求a2013 数列{an}满足a1=3,a2=6,an+2=an+1-an,求a2013