$$\lim_{x \to 4^-}\left(\left(\sqrt{x} + 1\right) - \frac{3}{x}\right) = \frac{9}{4}$$
More at x→4 from the left$$\lim_{x \to 4^+}\left(\left(\sqrt{x} + 1\right) - \frac{3}{x}\right) = \frac{9}{4}$$
$$\lim_{x \to \infty}\left(\left(\sqrt{x} + 1\right) - \frac{3}{x}\right) = \infty$$
More at x→oo$$\lim_{x \to 0^-}\left(\left(\sqrt{x} + 1\right) - \frac{3}{x}\right) = \infty$$
More at x→0 from the left$$\lim_{x \to 0^+}\left(\left(\sqrt{x} + 1\right) - \frac{3}{x}\right) = -\infty$$
More at x→0 from the right$$\lim_{x \to 1^-}\left(\left(\sqrt{x} + 1\right) - \frac{3}{x}\right) = -1$$
More at x→1 from the left$$\lim_{x \to 1^+}\left(\left(\sqrt{x} + 1\right) - \frac{3}{x}\right) = -1$$
More at x→1 from the right$$\lim_{x \to -\infty}\left(\left(\sqrt{x} + 1\right) - \frac{3}{x}\right) = \infty i$$
More at x→-oo