February 2019 1 118 Report

 $\fbox{AM 56 *} Fie f : $ \mathbb_{R} $ \rightarrow \mathbb_{R}$ o functie neconstanta astfel incat \\ pentru orice x \in \mathbb_{R} $ avem $f(x+r\pi) = f(x), (\forall) $ $ r \in \mathbb_{Q}. $ \ Sa se determine \\ multimea punctelor de continuitate ale functiei f. \\ \\ a) \{0\} \quad\quad b) \emptyset \quad\quad c) $ $\mathbb_{R} \quad \quad $ d) $ \mathbb_{Q} \quad\quad $ e) $ \mathbb_{Z} \quad\quad $ f) $ \mathbb_{R} $ $ \backslash \ \{0\}

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