Proof by contradiction is how you should solve this question Assume there are twofixed pointsfirst, and show this leads to a contradiction You will need M V T, the only question will be what to apply M V T to Q3 Preview Say that f is differentiable and f'(x) 1 on ( co, co) Show that there is at most one real number a such that f(a) a (We say that f has a fixed point at a )

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Question: Proof by contradiction is how you should solve this question. Assume there are twofixed pointsfirst, and show this leads to a contradiction. You will need

Proof by contradiction is how you should solve this question. Assume there are twofixed pointsfirst, and show this leads to a contradiction.
You will need M.V.T, the only question will be what to apply M.V.T. to!

Q3: Preview Say that f is differentiable and f'(x) # 1 on (-co, co). Show that there is at most one real number a such that f(a) = a. (We say that f has a fixed point at a.)

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