已知x1≠1,xn>0,xn+1=xn(xn^2+3)/(3xn^2+1)(n∈N),求证:数列{xn}或者对任意正整数
已知x1≠1,xn>0,xn+1=xn(xn^2+3)/(3xn^2+1)(n∈N),求证:数列{xn}或者对任意正整数n都满足xn
已知x1≠1,xn>0,xn+1=xn(xn^2+3)/(3xn^2+1)(n∈N),求证:数列{xn}或者对任意正整数n都满足xnxn+1,若用反证法,则应假设
A.对任意的正整数n,均有xn=xn+1
B.存在正整数n,使xn=xn+1
C.存在正整数n,使xn+1≥xn,且xn+1≥xn+2
D.存在正整数n,使(xn+1-xn)(xn+1-xn+2))≥0