
Concept explainers
(a)
To Find: The boundary points of
(a)

Answer to Problem 14E
The boundary points of the sets
Explanation of Solution
Given Information:
The point
Considering
Again since
If we consider for
For
Therefore, 6 is also boundary point.
Thus 3,5 and 6 are the boundary points.
Hence, the boundary points of the sets
(b)
To Prove: If
(b)

Explanation of Solution
Given Information:
The point
Prove:
Considering
If
Again, if
Thus
Thus, it shows that
Hence, proved.
(c)
To Prove: If
(c)

Explanation of Solution
Given Information:
The point
Prove:
Considering
Alternatively, consider
Consider,
Thus,
Hence, proved.
(d)
To Prove: If
(d)

Explanation of Solution
Given Information:
The point
Prove:
Considering
Suppose,
Alternatively, suppose
Thus
Hence, proved.
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Chapter 7 Solutions
A Transition to Advanced Mathematics
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