limx→∞3x2−5x+1x3−1\lim_{x\rightarrow \infty}\frac{3x^2 - 5x + 1}{x^3 - 1} limx→∞x3−13x2−5x+1
limx→9x−3x−9\lim_{x\rightarrow 9} \frac{\sqrt{x} - 3}{x - 9} limx→9x−9x−3
limx→−3x2−x+12x+3\lim_{x\rightarrow -3} \frac{x^2 - x + 12}{x + 3}limx→−3x+3x2−x+12
limx→∞2x+1x2−x\lim_{x\rightarrow \infty} \frac{2x + 1}{\sqrt{x^2 - x}} limx→∞x2−x2x+1
lim→∞sin1x\lim_{\rightarrow \infty}\sin\frac{1}{x} lim→∞sinx1