在数列{an}中,a1=0,且对任意K∈正整数,a2k-1,a2K+1成等差数列,其公差为2K,(1)证明a4,a5,a6成等比数列(2)求数列{an}的通项公式?a2K-1 ,a2K,a2K+1成等差数列!
问题描述:
在数列{an}中,a1=0,且对任意K∈正整数,a2k-1,a2K+1成等差数列,其公差为2K,(1)证明a4,a5,a6成等比数列
(2)求数列{an}的通项公式?
a2K-1 ,a2K,a2K+1成等差数列!
答