lim n→∞ n/√(2n+1)(n+1)=

问题描述:

lim n→∞ n/√(2n+1)(n+1)=

lim n→∞ n/√(2n+1)(n+1)
=lim n→∞ 1/√(2+1/n)(1+1/n)=1/2