(Problem 7) Choose ALL correct statements, if more than one is correct. O (A) The decimal representation for hex number FF is 255. (B) For any integer n > 0, the greatest common divisor gcd (n, 2021) = gcd (n, 2021 mod n). %3D (C) In order to find the inverse of b (mod a), we may first find integers x and y so that ax + by = 1. Then the inverse of b (mod a) is y. (D) The encrypted letters for “CDE" using encryption function f(x) = x – 5 (mod 26) is "XYZ".
(Problem 7) Choose ALL correct statements, if more than one is correct. O (A) The decimal representation for hex number FF is 255. (B) For any integer n > 0, the greatest common divisor gcd (n, 2021) = gcd (n, 2021 mod n). %3D (C) In order to find the inverse of b (mod a), we may first find integers x and y so that ax + by = 1. Then the inverse of b (mod a) is y. (D) The encrypted letters for “CDE" using encryption function f(x) = x – 5 (mod 26) is "XYZ".
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:(Problem 7) Choose ALL correct statements, if more than one is correct.
O (A)
The decimal representation for hex number FF is 255.
(В)
For any integer n > 0, the greatest common divisor
gcd (n, 2021) = gcd(n, 2021 mod n).
(С)
In order to find the inverse of b (mod a), we may first find
integers x and y so that ax + by = 1.
Then the inverse of b (mod a) is y.
(D)
The encrypted letters for "CDE" using encryption function
f(x) = x – 5 (mod 26) is "XYZ".
(E) None of the above is correct.
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