Math Problem Statement

Solve the following inequality algebraically.

vertical bar, x, minus, 1, vertical bar, is greater than or equal to, 13

x−1∣≥13

Solution

The inequality given is:

x113|x - 1| \geq 13

To solve this algebraically, we use the fact that for any absolute value inequality of the form AB|A| \geq B, where B0B \geq 0, the inequality can be rewritten as:

ABorABA \geq B \quad \text{or} \quad A \leq -B

In this case, A=x1A = x - 1 and B=13B = 13. Applying this rule, we break the absolute value inequality into two cases:

Case 1: x113x - 1 \geq 13

x113x - 1 \geq 13 Add 1 to both sides: x14x \geq 14

Case 2: x113x - 1 \leq -13

x113x - 1 \leq -13 Add 1 to both sides: x12x \leq -12

Final Solution

Combining both cases, the solution is:

x14orx12x \geq 14 \quad \text{or} \quad x \leq -12

In interval notation, this can be written as: x(,12][14,)x \in (-\infty, -12] \cup [14, \infty)

Would you like more details or have any questions?

Here are 5 related questions to expand your understanding:

  1. How would the solution change if the inequality were strict (x1>13|x - 1| > 13) instead of non-strict?
  2. How do you solve inequalities involving absolute values that are less than a number (e.g., x1<13|x - 1| < 13)?
  3. Can you explain the geometric interpretation of absolute value inequalities on a number line?
  4. How would this inequality change if we had x+313|x + 3| \geq 13?
  5. What happens when the inequality involves a quadratic expression inside the absolute value?

Tip: When solving absolute value inequalities, always remember to break the problem into two separate inequalities!

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Math Problem Analysis

Mathematical Concepts

Algebra
Absolute Value Inequalities

Formulas

|A| ≥ B can be rewritten as A ≥ B or A ≤ -B

Theorems

Absolute Value Inequality Theorem

Suitable Grade Level

Grades 8-10