a) Find all m 1 such that 27 = 9 (mod m). [1 0 1] b) If A = |0 1 11 1| is a zero-one matrix, find A A A21. b) Find the inverse of the encrypting function f(x) = (5 – x) mod 26, 0 s x < 25, and use it to decrypt the message "ZRQUBFNB".
a) Find all m 1 such that 27 = 9 (mod m). [1 0 1] b) If A = |0 1 11 1| is a zero-one matrix, find A A A21. b) Find the inverse of the encrypting function f(x) = (5 – x) mod 26, 0 s x < 25, and use it to decrypt the message "ZRQUBFNB".
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter3: Matrices
Section3.5: Subspaces, Basis, Dimension, And Rank
Problem 63EQ
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