/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 67 Solve each absolute value inequa... [FREE SOLUTION] | 91Ó°ÊÓ

91Ó°ÊÓ

Solve each absolute value inequality. $$|x|>3$$

Short Answer

Expert verified
\(x > 3\) or \(x < -3\)

Step by step solution

01

Understand and Breakdown the Absolute Value Inequality

In this exercise, the absolute value inequality is \(|x| > 3\). Remember, whenever the absolute value of an object is greater than a number, then this object can be either greater than that number or less than the negative of that number. It is because the absolute value of any number is the distance from that number to 0 on the number line which is positive or zero, therefore \(|x| > 3\) implies that \(x > 3\) or \(x < -3\). This is what needs to be addressed.
02

Solve the Inequalities

To solve this absolute value inequality, we need to address the two situations mentioned earlier: Either \(x > 3\) or \(x < -3\). It indicates that the solution to this inequality will at the two ends of the number line.
03

Write Down the Solution

The solution to the inequality \(|x| > 3\) is \(x > 3\) or \(x < -3\).

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Number Line
The number line is an essential tool for understanding absolute value inequalities. It is a visual representation of numbers in a horizontal line where each point corresponds to a unique number. The center of this line, marked by 0, is crucial when working with absolute values. Absolute value measures the distance from a number to 0 on this line.

Imagine this exercise as searching for the points further away than 3 units from 0. With \(|x| > 3\), you need to find all points either more than 3 units to the right or the left on the number line. This means our solutions include any point greater than 3 and any point less than -3. Visualizing these on the number line helps confirm the solution. It’s a good practice to sketch these out, marking clear intervals that represent the solution set.
Inequalities
Inequalities are statements about the relative size or order of two numbers. In our exercise, the inequality \(|x| > 3\) signifies that we are comparing the distance of \(|x|\) from zero to 3. Understanding inequalities involves recognizing the symbols used:
  • > : Greater than
  • < : Less than
Here, \(|x| > 3\) implies two cases: \(x > 3\) or \(x < -3\). These cases arise because the absolute value function concerns distance, which can be approached from both sides of zero. When dealing with inequalities like these, it's vital to interpret them as instructions for dividing the number line into intervals that meet the condition.
Solution Set
Once you identify the intervals on the number line satisfying the inequality, you form the solution set. For \(|x| > 3\), the solution set includes all numbers beyond a distance of 3 units from zero. Thus, it is written as two separate intervals: \(x > 3\) and \(x < -3\).

These intervals align with the inequality's requirement that values of \(|x|\) must exceed 3. The solution set can be expressed as (-∞, -3) \cup (3, ∞). This union of intervals signifies that any number fitting either condition is part of the solution. This form of representation helps us understand which numbers satisfy the original inequality by listing all possible solutions.

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Most popular questions from this chapter

In Exercises \(112-123,\) use the strategy for solving word problems, modeling the verbal conditions of the problem with a linear inequality. A truck can be rented from Basic Rental for \(\$ 50\) per day plus \(\$ 0.20\) per mile. Continental charges \(\$ 20\) per day plus \(\$ 0.50\) per mile to rent the same truck. How many miles must be driven in a day to make the rental cost for Basic Rental a better deal than Continental's?

Solve each equation. $$\frac{1}{x^{2}-3 x+2}=\frac{1}{x+2}+\frac{5}{x^{2}-4}$$

Use the strategy for solving word problems, modeling the verbal conditions of the problem with a linear inequality. A company manufactures and sells blank audiocassette tapes. The weekly fixed cost is \(\$ 10,000\) and it costs \(\$ 0.40\) to produce each tape. The selling price is \(\$ 2.00\) per tape. How many tapes must be produced and sold each week for the company to generate a profit?

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The formula for converting Fahrenheit temperature, \(F,\) to Celsius temperature, \(C\), is $$C=\frac{5}{9}(F-32)$$ If Celsius temperature ranges from \(15^{\circ}\) to \(35^{\circ},\) inclusive, what is the range for the Fahrenheit temperature? Use interval notation to express this range.

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