设数列{ Xn } 满足│Xn+1-Xn│≤k│Xn-Xn-1│,n=2,3,...(0

问题描述:

设数列{ Xn } 满足│Xn+1-Xn│≤k│Xn-Xn-1│,n=2,3,...(0

这个显然吗.因为设:yn=│Xn+1-Xn│,n=1,2,...因为(yn+1)/yn≤k