lim x趋向于无穷 (2^n+1+3^n+1)/(2^n+3^n)=

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limx趋向于无穷(2^n+1+3^n+1)/(2^n+3^n)=limx趋向于无穷(2^n+1+3^n+1)/(2^n+3^n)=limx趋向于无穷(2^n+1+3^n+1)/(2^n+3^n)=x

lim x趋向于无穷 (2^n+1+3^n+1)/(2^n+3^n)=
lim x趋向于无穷 (2^n+1+3^n+1)/(2^n+3^n)=

lim x趋向于无穷 (2^n+1+3^n+1)/(2^n+3^n)=
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