Let f: ℝ → ℝ be the function f(x) = 1/(1 + e⁻ˣ). The value of the derivative…
Let f: ℝ → ℝ be the function f(x) = 1/(1 + e⁻ˣ).
The value of the derivative of f at x where f(x) = 0.4 is ______ (rounded off to two decimal places).
Note: ℝ denotes the set of real numbers.
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