(1+1/x)^(2*x)
((1 + 1)/x)^(2*x)
(1 + 1/x)^(2*x)
2*x / 1\ lim |1 + 1*-| x->oo\ x/
Limit((1 + 1/x)^(2*x), x, oo, dir='-')
2 e