| Exam Board | AQA |
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| Module | Paper 2 (Paper 2) |
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| Year | 2020 |
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| Session | June |
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| Marks | 1 |
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| Topic | Exponential Functions |
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1 Which one of these functions is decreasing for all real values of \(x\) ?
Circle your answer.
[0pt]
[1 mark]
$$\mathrm { f } ( x ) = \mathrm { e } ^ { x } \quad \mathrm { f } ( x ) = - \mathrm { e } ^ { 1 - x } \quad \mathrm { f } ( x ) = - \mathrm { e } ^ { x - 1 } \quad \mathrm { f } ( x ) = - \mathrm { e } ^ { - x }$$