lim→0+ lnx ln(1+X）=lim→0+ ln(1+X)/(1/inx) 运用洛比达法则=lim→0+ （1/x+1）/(-1/xln^2x)=lim→0+ 1/x+1 *lim→0+ -x*ln^2x=lim→0+ -ln^2x/(1/x) 运用洛比达法则=lim→0+ -(2lnx/x)/(-1/x^2) =lim→0+ 2lnx/(...