Question: 2.20 Consider the equation ex - x - 1 = 0. (a) Sketch the functions in this equation and then use this to explain

2.20 Consider the equation ex - x - 1 = 0. (a) Sketch the functions in this equation and then use this to explain why there are only two solutions to this equation and describe where they are located for small values of . (b) Find a two-term asymptotic expansion, for small , of each solution.

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