Limit At 2 B44B73
1. **State the problem:** Find the limit $$\lim_{x \to 2} \frac{x^2 + 4}{x - 2}$$.
2. **Understand the problem:** We want to find the value that the expression approaches as $x$ gets closer to 2.
3. **Check direct substitution:** Substitute $x=2$ into the expression:
$$\frac{2^2 + 4}{2 - 2} = \frac{4 + 4}{0} = \frac{8}{0}$$ which is undefined (division by zero).
4. **Analyze the behavior:** Since direct substitution leads to division by zero, the limit may be infinite or does not exist.
5. **Consider the numerator and denominator separately:**
- Numerator at $x=2$ is $8$ (positive).
- Denominator approaches $0$ from the left or right depending on $x$.
6. **Check the left-hand limit ($x \to 2^-$):**
- Denominator $x-2$ is slightly negative.
- Numerator is positive.
- So the fraction approaches $+\infty$ or $-\infty$? Since numerator positive and denominator negative, fraction approaches $-\infty$.
7. **Check the right-hand limit ($x \to 2^+$):**
- Denominator $x-2$ is slightly positive.
- Numerator positive.
- Fraction approaches $+\infty$.
8. **Conclusion:** Left and right limits are not equal, so the limit does not exist.
**Final answer:** $$\lim_{x \to 2} \frac{x^2 + 4}{x - 2} \text{ does not exist}$$ because the left and right limits differ.