Stabiliți dacă următoarele mulțimi sunt finite sau infinite:
A={x€Q/0< sau egal x< sau egal 222}
B={x€Q/7x€Z}
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[tex] 0 \leqslant x \leqslant 222 \\ x \in \{0 \: \c{} \: 1\: \c{} \: \: 2 \: \c{} \: ... \: \: \c{} \: 222 \} \implies \bf {multime \: \: finita}\\ \\ 7x \in \mathbb{Z} \\ x \in \mathbb{R} \: \implies \bf{multime \: \: infinita} [/tex]