lim(n->∞)[2^(2n-1)+1]/(4^n-3^n)=?
问题描述:
lim(n->∞)[2^(2n-1)+1]/(4^n-3^n)=?
答
=lim[1/2*4^n+1]/[4^n-3^n]
=lim[1/2+1/4^n]/[1-(3/4)^n]
=1/2