10. Prove that the product of two integers is odd if and only if both of the integers are odd. 11. Prove that if r is a real solution to r + 3x2 + 7x +2=0, then r must be negative.
10. Prove that the product of two integers is odd if and only if both of the integers are odd. 11. Prove that if r is a real solution to r + 3x2 + 7x +2=0, then r must be negative.
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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Need help with these two logic questions. Thanks
Transcribed Image Text:10. Prove that the product of two integers is odd if and only if both of the integers are odd.
11. Prove that if x is a real solution to r5 + 3x2 + 7x + 2 = 0, then r must be negative.
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