9. Determine which of the following congruences have solutions, and find any solutions (between 0 and the modulus) by trial and error. a. 4r = 5 (mod 7). b. 67 = 4 (mod 9). c. r' = 2 (mod 7).
9. Determine which of the following congruences have solutions, and find any solutions (between 0 and the modulus) by trial and error. a. 4r = 5 (mod 7). b. 67 = 4 (mod 9). c. r' = 2 (mod 7).
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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Transcribed Image Text:9. Determine which of the following congruences have solutions, and find any
solutions (between 0 and the modulus) by trial and error.
a. 4r = 5 (mod 7).
b. 67 = 4 (mod 9).
c. r' = 2 (mod 7).
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