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|x|<1 ajutatima varog frumos

Răspuns :

|x|=>[tex] \left \{ {{x=-x} \atop {x=+x}} \right. [/tex]

[tex]|x|\ \textless \ 1 \\ x\ \textless \ 1 \\ x\ \textgreater \ -1 \\ -1\ \textless \ x\ \textless \ 1 \\ x \in (-1,1)[/tex]