Let X = {strings in A} Name two B, C C X and two D, E C X such that... a) BUC = X B = C = b) DnE + Ø D = E =
Let X = {strings in A} Name two B, C C X and two D, E C X such that... a) BUC = X B = C = b) DnE + Ø D = E =
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question
100%
Stuck need help! The class I'm taking is computer science discrete structures.
Problem is attached. please view both attachments before answering.
I need help with parts A and B.
Please explain answer so I can fully understand.
Really struggling with this concept. Thank you so much.

Transcribed Image Text:Let X =
{strings in A} Name two B, CE X and two D, E C X such that...
a) BUC = X
B =
C =
b) DnE + Ø
D =
E =
I| ||

Transcribed Image Text:Let Set A
{the quick brown fox jumped over the lazy dog} be a set of strings (two or
%3D
more characters) formed by characters (single letters) in the standard alphabet.
Enumerate (assign numbers to) the alphabet as
A
В
C
E
F
K
M
P
Q
V
W
Y
1
3
4
5
7
8
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Consider the following encryption algorithm written in pseudo code:
Encrypt(set):
define f (x) = x + 13 mod 26.
Now,
Vx E characters of A,
If x = 14 mod 26,
> f (x)
Then x →
If not,
Then x → X
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