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Use an example to explain the concept of an "identity function"
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The function $\mathrm{f}$ is referred to as the identity function in case each element of set A has an image on itself. For example, $\mathrm{f}$ (a) $=$ a $\forall$ $\mathrm{a} \in \mathrm{A}$. Its denotation takes place by I. Example: Consider, $\mathrm{A}=\{1,2,3,4,5\}$.
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