Inverse Function

"Not a lot of people know this, but I'm very good at mathematics. When I was an angry teenager, I used to sit in my room and do quadratic equations to calm myself down "

Samantha Bond

Extra

Material and references:

Hodder Book SL (ISBN: 9781510462359):
Chapter 14B

Key Points

1. You should be able to find inverse functions. To find an expression for \(f^{-1}(x)\): let \(y=f(x)\), rearrange to make \(x\) the subject, and then state \(f^{-1}(x)\) by replacing any \(y\)'s with \(x\)'s.
2. You should know when inverse functions exist. A function must be one-to-one in order to have an inverse.

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