hiwell................ this is my first thread on this site

my name is mohamed and iam at engineering faculty first grade well i was solving an excersise preparing for my next week exam and i found tough proble i spent hours trying to solve it but i failed i wish if any one can help me here he problem is

lim [lnX - 1]/X - e

X tends to "e"

and something else can any one help me howto write maths sympols here excuseme i dont do on forums alot

thxxxxxxx