1. **State the problem:** We need to find the limit $$\lim_{x \to 1} \frac{x^{2} + 5x + 4}{x^{2} - 2x - 3}$$.
2. **Recall the formula and rules:** To find limits of rational functions as $x$ approaches a value, first try direct substitution. If it results in an indeterminate form like $\frac{0}{0}$, factor numerator and denominator and simplify.
3. **Direct substitution:** Substitute $x=1$:
$$\frac{1^{2} + 5(1) + 4}{1^{2} - 2(1) - 3} = \frac{1 + 5 + 4}{1 - 2 - 3} = \frac{10}{-4} = -\frac{5}{2}$$
4. Since direct substitution gives a defined value, the limit is simply:
$$\boxed{-\frac{5}{2}}$$
No indeterminate form appeared, so no further simplification is needed.
Limit Rational F2A4Fc
Step-by-step solutions with LaTeX - clean, fast, and student-friendly.