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Function — Statistics STD 11 Commerce — Question

Gujarat BoardEnglish MediumSTD 11 CommerceStatisticsFunction2 Marks
Question
$\mathrm{P}=\{0,1,2,3\}, \mathrm{Q}=\left\{0,1, \frac{1}{2}, \frac{1}{3}\right\} ; f(x)=\frac{x-1}{x+1} x \in A .$ Can this be called a function?
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Answer

$f(x)=\frac{x-1}{x+1}$ cannot be called a function

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