Question

这道题用罗比达法则怎么算?

Answer 1

原式=lim(x->0+)（2lnx*1/x)/(-1/x²)

=-2lim(x->0+)lnx/(1/x)

=-2lim(x->0+)(1/x)/(-1/x²)

=2lim(x->0+)x

=0