Table of contents
- 0. Review of Algebra4h 16m
- 1. Equations & Inequalities3h 18m
- 2. Graphs of Equations43m
- 3. Functions2h 17m
- 4. Polynomial Functions1h 44m
- 5. Rational Functions1h 23m
- 6. Exponential & Logarithmic Functions2h 28m
- 7. Systems of Equations & Matrices4h 6m
- 8. Conic Sections2h 23m
- 9. Sequences, Series, & Induction1h 19m
- 10. Combinatorics & Probability1h 45m
1. Equations & Inequalities
Linear Inequalities
1:54 minutes
Problem 107b
Textbook Question
Textbook QuestionIn Exercises 107–110, use graphs to find each set. (-2,1] ∩ [-1,3)
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Interval Notation
Interval notation is a mathematical notation used to represent a range of values. It uses parentheses and brackets to indicate whether endpoints are included or excluded. For example, in the interval (-2, 1], -2 is excluded (parenthesis) while 1 is included (bracket). Understanding this notation is crucial for accurately interpreting and combining intervals.
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Interval Notation
Graphing Intervals
Graphing intervals involves visually representing the range of values on a number line. Each interval is depicted as a line segment, with open circles indicating excluded endpoints and closed circles for included endpoints. This visual representation helps in understanding the overlap between different intervals, which is essential for solving problems involving intersections.
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Identifying Intervals of Unknown Behavior
Set Intersection
Set intersection refers to the common elements shared between two or more sets. In the context of intervals, the intersection of two intervals is the set of values that lie within both ranges. For example, to find the intersection of (-2, 1] and [-1, 3), one must identify the overlapping values, which is a key step in solving the given problem.
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Parallel & Perpendicular Lines
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