$$\lim_{x \to 0^-}\left(\frac{i n \left(x + 1\right)}{x}\right) = \infty i n$$
More at x→0 from the left$$\lim_{x \to 0^+}\left(\frac{i n \left(x + 1\right)}{x}\right) = \infty i n$$
$$\lim_{x \to \infty}\left(\frac{i n \left(x + 1\right)}{x}\right) = i n$$
More at x→oo$$\lim_{x \to 1^-}\left(\frac{i n \left(x + 1\right)}{x}\right) = 2 i n$$
More at x→1 from the left$$\lim_{x \to 1^+}\left(\frac{i n \left(x + 1\right)}{x}\right) = 2 i n$$
More at x→1 from the right$$\lim_{x \to -\infty}\left(\frac{i n \left(x + 1\right)}{x}\right) = i n$$
More at x→-oo