lim lnx²x→e ------ =2xlim lnx²x→ -e ------- =2x

lim lnx²
x→e ------ =
2x
lim lnx²
x→ -e ------- =
2x

（1）lim(x-e) 2lnx/2x=lim(x-e)lnx/x=lne/e=1/e;
(2)原是=ln(-e)^2/2*（-e)=-1/e