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Function — Statistics STD 11 Commerce — Question

Gujarat BoardEnglish MediumSTD 11 CommerceStatisticsFunction1 Mark
Question
Define one-one function in notations.
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Answer

Suppose. $f: A \rightarrow B$. If for any two different elements $x_1$ and $X_2 \cdot f\left(x_1\right) \neq f\left(x_2\right)$ then function $f$ is called one-one function.

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