rue that kn, k+n, and k-n are integers. An integer k is even if and only if here exists an integer r such that k=2r. An integer k is odd if and only if here exists an integer r such that k=2r+1. For every integer k it is true that if k is even then k is not odd. For every integer k it is true that if k is odd then k is not even. For every integer k it is true that if k is not even then k is odd. For every integer k it is true that if k is not odd then k is even. fP then Q means the same thing as P → Q (P implies Q).

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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This is a report already, I deleted question 3 since it was answered already and now I want an answer for question 4 thank you

Note: For all integers k,n it is
true that kn, k+n, and k-n are integers. An integer k is even if and only if
there exists an integer r such that k=2r. An integer k is odd if and only if
there exists an integer r such that k=2r+1.
For every integer k it is true that if k is even then k is not odd.
For every integer k it is true that if k is odd then k is not even.
For every integer k it is true that if k is not even then k is odd.
For
every integer k it is true that if k is not odd then k is even.
If P then Q means the same thing as P → Q (P implies Q).
Prove that for every integer d, if d³ is odd then d is odd.
4.
Transcribed Image Text:Note: For all integers k,n it is true that kn, k+n, and k-n are integers. An integer k is even if and only if there exists an integer r such that k=2r. An integer k is odd if and only if there exists an integer r such that k=2r+1. For every integer k it is true that if k is even then k is not odd. For every integer k it is true that if k is odd then k is not even. For every integer k it is true that if k is not even then k is odd. For every integer k it is true that if k is not odd then k is even. If P then Q means the same thing as P → Q (P implies Q). Prove that for every integer d, if d³ is odd then d is odd. 4.
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