数列x1,x2...Xn.满足x=1/3 x( n+1)= xn^2+ xn 则1/(x1+1)+1/(x2+1)+.+
数列x1,x2...Xn.满足x=1/3 x( n+1)= xn^2+ xn 则1/(x1+1)+1/(x2+1)+.+
已知数列{xn}满足x1=3,x2=x1/2,...,xn=1/2(xn-1+xn-2),n=3,4,...,则xn等于
已知数列{Xn}满足X2=X1/2,Xn=1/2(Xn-1+ Xn-2),n=3,4,…,若n趋于无穷大Xn趋于2,则X
数列满足x1=1,x2=2/3,且1/xn-1+1/xn+1=2/xn(n>=2),则xn等于多少?
数列满足x1=1,x2=2/3,且1/xn-1+1/xn+1=2/xn(n>=2),则xn等于多少
已知数列xn满足x1=4,x(n+1)=(xn^2-3)/(2xn-4)
已知数列{xn}满足xn+1=xn-xn-1(n≥2),x1=a,x2=b,Sn=x1+x2+…+xn,则下面正确的是(
数列xn满足x1/x1+1=x2/x3+3=x3/x3=5=.=xn/xn+2n-1,且x1+x2+x3+.+xn=8,
设x1,x2,...,xn>0,(1)若1,x1,x2,...,xn,2成等差数列,则x1+x2+...+xn=____
数列{Xn}中,X1=1/2,X(n+1)=2Xn/(1+Xn^2),求Xn
若数列{xn}满足:x1=1,x2=3,且x
已知数列{Xn}满足Xn+1=Xn^2+Xn,X1=a(a-1),数列{Yn}满足Yn=1/(Xn+1),设Pn=X/(