Q: State whether the following statements are true or false: 1. Let S be a non-empty subset of the set of real numbers R. Ir s is bounded above, then Sups is exist, but need not to be unique in general. V 2. If A = (-5, 5) and B = (5,10), then Inf (A + B) = 10 and Sup(A + B) = 15. 3. The closed interval [1,2] has no maximal element. %3D
Q: State whether the following statements are true or false: 1. Let S be a non-empty subset of the set of real numbers R. Ir s is bounded above, then Sups is exist, but need not to be unique in general. V 2. If A = (-5, 5) and B = (5,10), then Inf (A + B) = 10 and Sup(A + B) = 15. 3. The closed interval [1,2] has no maximal element. %3D
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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![Q: State whether the following statements are true or false:
1. Let S be a non-empty subset of the set of real numbers R. Ir s is bounded above, then Sups
is exist, but need not to be unique in general.
2. If A = (-5,5) and B = (5,10), then Inf(A + B) = 10 and Sup(A + B) = 15.
3. The closed interval [1,2] has no maximal element.
4. The set of natural numbers N of R is unbounded.
5. The set of real numbers R, has Sup(R) = o and Inf(R) = -co.
6 The set S= (x E RỊ x? - 25 s 0} has Max(S) = 5 and Inf(S) = -5 with no minimal
%3D
element.
7. The set S = {1+nez*} has Max(S) = 2 and Min(S) = 1.
8. Every bounded set of real numbers R has maximal and minimal elements.
9. The properties (M2) and (M2) of the definition of the metric space are state that the distance
from any point to another is never negative, and that the distance from a point to itself is
zero.
10. There are many metric functions d: M x M -R that can be defined on a non-empty set M.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3aadc2fa-ea79-4d0d-8a67-7c68097d5fb5%2Fbd3bf4f6-d69a-476b-b3af-5c90b6ecd0c6%2Fivj9qww_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Q: State whether the following statements are true or false:
1. Let S be a non-empty subset of the set of real numbers R. Ir s is bounded above, then Sups
is exist, but need not to be unique in general.
2. If A = (-5,5) and B = (5,10), then Inf(A + B) = 10 and Sup(A + B) = 15.
3. The closed interval [1,2] has no maximal element.
4. The set of natural numbers N of R is unbounded.
5. The set of real numbers R, has Sup(R) = o and Inf(R) = -co.
6 The set S= (x E RỊ x? - 25 s 0} has Max(S) = 5 and Inf(S) = -5 with no minimal
%3D
element.
7. The set S = {1+nez*} has Max(S) = 2 and Min(S) = 1.
8. Every bounded set of real numbers R has maximal and minimal elements.
9. The properties (M2) and (M2) of the definition of the metric space are state that the distance
from any point to another is never negative, and that the distance from a point to itself is
zero.
10. There are many metric functions d: M x M -R that can be defined on a non-empty set M.
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