$$\lim_{x \to 0^-} \frac{3}{10} = \frac{3}{10}$$ More at x→0 from the left $$\lim_{x \to 0^+} \frac{3}{10} = \frac{3}{10}$$ $$\lim_{x \to \infty} \frac{3}{10} = \frac{3}{10}$$ More at x→oo $$\lim_{x \to 1^-} \frac{3}{10} = \frac{3}{10}$$ More at x→1 from the left $$\lim_{x \to 1^+} \frac{3}{10} = \frac{3}{10}$$ More at x→1 from the right $$\lim_{x \to -\infty} \frac{3}{10} = \frac{3}{10}$$ More at x→-oo