Question: (a) Show that f (x) = x + e x is one-to-one. (b) What is the value of f -1 (1)? (c) Use the formula

(a) Show that f (x) = x + ex is one-to-one.
(b) What is the value of f-1(1)?
(c) Use the formula from Exercise 77(a) to find s f-1)'(1).

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