Question: 1. (4 points) Let (x) = 1 1 + e x . (a) Show that (x) = 1 (x). (b) Show that the derivative can

1. (4 points) Let (x) = 1 1 + e x . (a) Show that (x) = 1 (x).

(b) Show that the derivative can be written as: d dx(x) = (x)(1 (x))

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