e

1/e

$ \mathscr{C}_F $

$ \mathscr{C}_f $

e = 2.718281828459045
f = Function(1 / (x * log(x)), 1, Infinity)
A: (e^(1), f(e^(1)))
A': (x(A), 0)
A'': (0, y(A))
a = Segment(A'', A)
b = Segment(A, A')
F = Function(log(log(x)) + ℯ^(-1), 1, Infinity)
F' = Derivative(F)