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I2xI[tex] \leq [/tex] 1

Răspuns :

[tex]\displaystyle |2x| \leq 1 \\ 2x \leq 1 \\ x \leq \frac{1}{2} \\ 2x \geq -1 \\ x \geq - \frac{1}{2} \\ - \frac{1}{2} \leq x \leq \frac{1}{2} \\ x \in \left[- \frac{1}{2} , \frac{1}{2}\right] [/tex]