
Advanced Engineering Mathematics
10th Edition
ISBN: 9780470458365
Author: Erwin Kreyszig
Publisher: Wiley, John & Sons, Incorporated
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Transcribed Image Text:5. For real numbers x and y, recall that max(x, y) is the bigger number between x and y and
min(x, y) is the smaller number between x and y. Use a proof by cases to show that if x and y
are real numbers, then
max(x, y) + min(x, y) = x + y.
6. Prove that x is a rational number if and only if 2x – 1 is a rational number.
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