/ x E \ lim |E - ------| x->1+\ -1 + x/
Limit(E^x - E/(-1 + x), x, 1)
-oo
= -407.724212661809
/ x E \ lim |E - ------| x->1-\ -1 + x/
oo
= 413.160895536821
-407.724212661809