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Rezolvati inecuatia: |2x-1|<2. Va rog frumos​

Răspuns :

-2 < 2x-1 < 2 adunam toata ecuatia cu 1

-1 < 2x < 3  impartim toata ecuatia cu 2

-1/2 < x < 3/2 => x apaartine (-1/2 , 3/2)

|2x-1| < 2

⇔  (-2 < 2x-1)  ∧  (2x-1 < 2)

⇔  -2 < 2x-1 < 2 ⏐+1

⇔  -1 < 2x < 3 ⏐÷2

⇔  -1/2 < x < 3/2

⇔  x ∈ (-1/2, 3/2)