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The solution to the inequality \( |x - 2| \geq 4 \) is all real numbers \( x \) such that \( x \leq -2 \) or \( x \geq 6 \). In interval notation, this is \( (-\infty, \, -2] \cup [6, \, \infty) \).
Solución
To solve the inequality \( |x - 2| \geq 4 \) and graph the solution set, follow these steps:
### Step 1: Understand the Absolute Value Inequality
The inequality \( |x - 2| \geq 4 \) represents all real numbers \( x \) whose distance from 2 is at least 4 units on the number line.
### Step 2: Split the Inequality
An absolute value inequality of the form \( |A| \geq B \) (where \( B \geq 0 \)) can be rewritten as two separate inequalities:
1. \( A \geq B \)
2. \( A \leq -B \)
Applying this to \( |x - 2| \geq 4 \):
1. \( x - 2 \geq 4 \)
2. \( x - 2 \leq -4 \)
### Step 3: Solve Each Inequality Separately
1. **First Inequality:**
\[
x - 2 \geq 4 \\
x \geq 4 + 2 \\
x \geq 6
\]
2. **Second Inequality:**
\[
x - 2 \leq -4 \\
x \leq -4 + 2 \\
x \leq -2
\]
### Step 4: Combine the Solutions
The solutions to the inequality \( |x - 2| \geq 4 \) are all real numbers \( x \) such that:
\[
x \leq -2 \quad \text{or} \quad x \geq 6
\]
In **interval notation**, this is written as:
\[
(-\infty, \, -2] \cup [6, \, \infty)
\]
### Step 5: Graph the Solution Set
Below is a graph representing the solution set on a number line:
```
<----|=================•-------------------•=================|---->
-∞ -2 6 ∞
```
- **Closed Dots at -2 and 6:** Indicate that -2 and 6 are included in the solution (≥).
- **Shaded Arrows:**
- To the **left of -2**: Represents all \( x \) values less than or equal to -2.
- To the **right of 6**: Represents all \( x \) values greater than or equal to 6.
### Visual Representation
For a clearer visual, here's a number line illustration:
![Graph of |x-2| ≥ 4](https://i.imgur.com/YourImageLink.png)
*(Note: Replace the image link with an actual graph if you're presenting this in a medium that supports images.)*
### Summary
- **Solution:** \( x \leq -2 \) or \( x \geq 6 \)
- **Interval Notation:** \( (-\infty, \, -2] \cup [6, \, \infty) \)
- **Graph:** Number line with shaded regions extending to the left of -2 and to the right of 6, including the points -2 and 6.
Revisado y aprobado por el equipo de tutoría de UpStudy
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