题:已知正项数列{An}中,A1=1,2An²=An+1²+An-1²,n≥2,求A6
问题描述:
题:已知正项数列{An}中,A1=1,2An²=An+1²+An-1²,n≥2,求A6
答
2An²=An+1²+An-1²化简:An²=An得出A6=1
题:已知正项数列{An}中,A1=1,2An²=An+1²+An-1²,n≥2,求A6
2An²=An+1²+An-1²化简:An²=An得出A6=1