| Exam Board | AQA |
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| Module | Paper 2 (Paper 2) |
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| Year | 2019 |
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| Session | June |
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| Topic | Composite & Inverse Functions |
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3 Each of these functions has domain \(x \in \mathbb { R }\)
Which function does not have an inverse?
Circle your answer.
$$\mathrm { f } ( x ) = x ^ { 3 } \quad \mathrm { f } ( x ) = 2 x + 1 \quad \mathrm { f } ( x ) = x ^ { 2 } \quad \mathrm { f } ( x ) = \mathrm { e } ^ { x }$$