S
sakura_bacgiang


1) [TEX] x^3 - (3x^2-4x+4) \sqrt{x-1} \leq 0[/TEX]
2) [TEX] \sqrt{x^2+1} \geq \frac{2x^2 +2x+1}{4x-1} [/TEX]
2) [TEX] \sqrt{x^2+1} \geq \frac{2x^2 +2x+1}{4x-1} [/TEX]