怎样用洛必达法则求极限？

Question

如题所述

Answer 1

利用洛必达法则求极限

lim(x趋于+∞）ln(x-1)/(x-1)(x-2)

=lim(x趋于+∞）ln(x-1)/[x² (1-1/x)(1-2/x)]=lim(x趋于+∞）ln(x-1)/x²=lim(x趋于+∞）1/2x(x-1)=0

Answer 2

答：分子分母同时求导