Table of contents
- 0. Review of Algebra4h 18m
- 1. Equations & Inequalities3h 18m
- 2. Graphs of Equations1h 43m
- 3. Functions2h 17m
- 4. Polynomial Functions1h 44m
- 5. Rational Functions1h 23m
- 6. Exponential & Logarithmic Functions2h 28m
- 7. Systems of Equations & Matrices4h 5m
- 8. Conic Sections2h 23m
- 9. Sequences, Series, & Induction1h 22m
- 10. Combinatorics & Probability1h 45m
0. Review of Algebra
Exponents
Problem 104
Textbook Question
Let U = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, M = {0, 2, 4, 6, 8}, N = {1, 3, 5, 7, 9, 11, 13}, Q = {0, 2, 4, 6, 8, 10, 12}, and R = {0, 1, 2, 3, 4}.Use these sets to find each of the following. Identify any disjoint sets. (U ∩ ∅′) ∪ R
Verified step by step guidance1
Step 1: Understand the universal set U and the empty set ∅. The universal set U contains all elements under consideration, and the empty set ∅ has no elements. The complement of the empty set, denoted as ∅′, is the set of all elements in U that are not in ∅. Since ∅ has no elements, ∅′ = U.
Step 2: Calculate the intersection of U and ∅′, which is U ∩ ∅′. Since ∅′ = U, the intersection U ∩ ∅′ is simply U itself.
Step 3: Recall the set R = {0, 1, 2, 3, 4}. The problem asks for (U ∩ ∅′) ∪ R, which simplifies to U ∪ R because U ∩ ∅′ = U.
Step 4: Since U contains all elements from 0 to 13, and R is a subset of U, the union U ∪ R is just U. So the resulting set is U = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}.
Step 5: To identify any disjoint sets among the given sets, recall that two sets are disjoint if they have no elements in common. Check pairs such as M and N, M and Q, N and R, etc., by comparing their elements to see if their intersection is empty.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Universal Set and Subsets
The universal set U contains all elements under consideration, while subsets like M, N, Q, and R are parts of U. Understanding the relationship between the universal set and its subsets helps in performing set operations and interpreting results within the defined context.
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Set Complement
The complement of a set, denoted by ∅′, includes all elements in the universal set that are not in the given set. Since ∅ is the empty set, its complement is the entire universal set U. Recognizing complements is essential for correctly evaluating expressions involving complements.
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Complementary Events
Set Operations: Intersection and Union
Intersection (∩) finds common elements between sets, while union (∪) combines all elements from the involved sets without duplication. Applying these operations step-by-step allows for simplifying complex set expressions and identifying relationships such as disjointness.
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Related Practice
Textbook Question
In Exercises 87–106, perform the indicated computations. Write the answers in scientific notation. If necessary, round the decimal factor in your scientific notation answer to two decimal places. (2.4×10^−2)/(4.8×10^-6)
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