📢 QuizNe.vn will officially cease operations on 27/08/2026. Thank you for being with us.
- $ y' > 0,\\\forall x \\\ne 1$.
- $ y' < 0,\\\forall x \\\ne 1$.
- $ y' > 0,\\\forall x \\\in \\\mathbb{R}$.
- $ y' < 0,\\\forall x \\\in \\\mathbb{R}$.