\lim_{x \to \infty} \frac{x^3 + 4x}{7x^3 - x^2 + 5}
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$$\lim_{x \to \infty} \frac{x^3 + 4x}{7x^3 - x^2 + 5} = \lim_{x \to \infty} \frac{\frac{x^3}{x^3} + \frac{4x}{x^3}}{\frac{7x^3}{x^3} - \frac{x^2}{x^3} + \frac{5}{x^3}}$$ Show more…
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