(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Hello, Does anybody know how to solve this question? Or a formal way to prove that a fuction is strictly increasing?

Define f(x)={ x-1 if x<0

x+1 if x >_ 0

Show that f: R -> R is strictly increasing and that f^(-1) : f(R) -> R is continuous at 1

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Question about strictly increasing

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