数列[an]满足an=1\(n+1)(n+2),则极限(a1+a2+a3+.an)=?

数列{an}满足a1=1 an+1=2n+1an/an+2n 已知数列{an}满足a(n+1)=an+n,a1=1,则an= 数列an满足a1=1/3,Sn=n(2n-1)an,求an 数列{an}满足a1=2,a(n+1)=2an+n+2,求an 已知数列{an}满足an+1=an+n,a1等于1,则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 已知数列an满足a1=4,an=n+1/n-1乘以an-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 已知数列an满足an+1/an=n+2/n且a1=1,则an= 数列{an}满足an+1+(-1)^n an=2n-1,则{an}的前60项之和是多少 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a1=4/3,且an+1=4（n+1）an/3an+n