of a partition of Z i
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:5. Let A = {a, b, ..z} be the set consisting of the letters of the alphabet. For a € A, let Ag
consist of a and two letters that follow it, where A, = {y, z, a} and A, = {z, a. b}. Find a set
SSA of smallest cardinality such that Uaes Aa = A. Explain why your S has the required
properties.

Transcribed Image Text:8. Which of the following sets are partitions of A = {1,2,3,4,5}?
a. S, = {{1,3},{2,5}}
b. S, = {{1,2}, {3,4,5},{2,1}}
ç. S; = {{1,2},{2,3},{3,4}, {4,5}}
d. S4 = A
9. Give an example of a partition of Z into four subsets.
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