lim x趋向于无穷 (2^n+1+3^n+1)/(2^n+3^n)=
问题描述:
lim x趋向于无穷 (2^n+1+3^n+1)/(2^n+3^n)=
答
x趋向于无穷
lim(2*2^n+3*3^n)/(2^n+3^n)
=lim[2*(2/3)^n+3]/[(2/3)^n+1]
=3