For each pair of statements, choose the one that is true: (a) {4} ∈ {4, 5} or 4 ∈ {4, 5} (b) {10, 12, 14} ⊆ {2, 4, 6, 8, ...} or {10, 12, 14} ∈ {2, 4, 6, 8, ...} (c) q ⊆ {q, r} or... For each pair of statements, choose the one that is true: (a) {4} ∈ {4, 5} or 4 ∈ {4, 5} (b) {10, 12, 14} ⊆ {2, 4, 6, 8, ...} or {10, 12, 14} ∈ {2, 4, 6, 8, ...} (c) q ⊆ {q, r} or {q} ⊆ {q, r} (d) {g} \( \nsim \) {e, f, h} or {g} ∈ {e, g, h}
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Understand the Problem
The question presents four pairs of statements involving set theory. For each pair, the task is to identify the statement that is true. The statements involve the concepts of element inclusion (∈), subset inclusion (⊆), and non-equivalence (( \nsim )).
Answer
(a) $4 \in \{4, 5\}$ (b) $\{10, 12, 14\} \subseteq \{2, 4, 6, 8, ...\}$ (c) $\{q\} \subseteq \{q, r\}$ (d) $\{g\} \nsim \{e, f, h\}$
Answer for screen readers
(a) $4 \in {4, 5}$ (b) ${10, 12, 14} \subseteq {2, 4, 6, 8, ...}$ (c) ${q} \subseteq {q, r}$ (d) ${g} \nsim {e, f, h}$
Steps to Solve
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Analyze statement (a):
- Option 1: ${4} \in {4, 5}$. This statement says the set containing 4 is an element of the set {4, 5}. This is false because the elements of {4, 5} are 4 and 5, not {4}.
- Option 2: $4 \in {4, 5}$. This statement says that 4 is an element of the set {4, 5}, which is true.
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Analyze statement (b):
- Option 1: ${10, 12, 14} \subseteq {2, 4, 6, 8, ...}$. This statement means that the set {10, 12, 14} is a subset of the set of even numbers. Since 10, 12, and 14 are all even numbers, this is a valid subset. So, this statement is true.
- Option 2: ${10, 12, 14} \in {2, 4, 6, 8, ...}$. This statement means {10, 12, 14} is an element of the set of even numbers. This is false.
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Analyze statement (c):
- Option 1: $q \subseteq {q, r}$. This is incorrect because $q$ is an element, not a set. Subsets relate two sets.
- Option 2: ${q} \subseteq {q, r}$. This means the set containing q is a subset of the set {q, r}. Since q is an element of {q, r}, the set {q} is indeed a subset of {q, r}. So, this statement is true.
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Analyze statement (d):
- Option 1: ${g} \nsim {e, f, h}$. This uses the symbol $\nsim$, which the prompt says means non-equivalence. If it means the sets are not equal, then this is true because the set containing $g$ is not equal to the set containing $e$, $f$, and $h$.
- Option 2: ${g} \in {e, g, h}$. This means the set {g} is an element of the set {e, g, h}. The elements of {e, g, h} are e, g, and h. This statement is thus false.
(a) $4 \in {4, 5}$ (b) ${10, 12, 14} \subseteq {2, 4, 6, 8, ...}$ (c) ${q} \subseteq {q, r}$ (d) ${g} \nsim {e, f, h}$
More Information
Understanding the difference between subset inclusion $ \subseteq $ and element inclusion $ \in $ is crucial in set theory. A subset contains elements that are also present in another set, while an element is a member of a set. The symbol $\nsim$ means "not equivalent to".
Tips
Confusing element inclusion with subset inclusion is a common mistake. Remember that $ \in $ relates an element to a set, while $ \subseteq $ relates a set to another set.
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