Math Problem Statement
Graph on a number line: -|x|-3 is greater than -7; D={Integers}
Solution
Let's break down the inequality step by step:
Given inequality:
Step 1: Isolate the absolute value term
Add 3 to both sides of the inequality:
Step 2: Multiply both sides by -1
When multiplying or dividing by a negative number, the inequality sign flips:
Step 3: Solve the inequality for
The inequality means that the distance of from 0 is less than 4. So, the solution is:
Step 4: Consider the domain
Since the problem specifies that the domain is the set of integers, we need to find all integer values of that satisfy this inequality.
The integers that lie between -4 and 4 (not including -4 and 4 themselves) are:
Step 5: Graph on a number line
You will plot these values as open circles at , since the inequality is strict (, not ).
Let me know if you would like me to graph it for you or if you'd like further clarification!
Here are 5 questions to expand on this topic:
- What happens if the inequality is ?
- How would the solution change if the domain were real numbers instead of integers?
- Can we graph absolute value inequalities on a number line even if the domain is continuous?
- How do we solve inequalities involving absolute value with a negative right-hand side?
- What does it mean geometrically to solve absolute value inequalities?
Tip: Always remember to flip the inequality sign when multiplying or dividing by a negative number!
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Math Problem Analysis
Mathematical Concepts
Inequalities
Absolute Value
Algebra
Graphing on a number line
Formulas
-|x| - 3 > -7
|x| < 4
Theorems
Solving absolute value inequalities
Multiplying/dividing by negative numbers flips the inequality sign
Suitable Grade Level
Grades 7-9