证明数列的极限证明lim(3n+1)/(2n+1)=3/2
问题描述:
证明数列的极限
证明lim(3n+1)/(2n+1)=3/2
答
注意lim 1/n=0
则 lim(3n+1)/(2n+1)
=lim(3+1/n)/(2+1/n)
=(3+lim1/n)/(2+lim1/n)
=(3+0)/(2 +0)
= 3/2