(5) Let A be the set of all real numbers in the interval (0,1) vehose decimal expansions contain only the digits "0" and "3". For example numbers 0.3, 0.03, 0.0300 303,... etc are in the set A, whereas 0,0300403 is not in the set A. a) use diagonalization process to explain why A is not a countable subset of (0,1) b) List an infinite number of rationals that are in the set A

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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(5 Let A be the set of all real numbers
in the interval (0,0) vehose decimal expansions
contain only the digits "0" and "3". For example
numbers 0.3, 0.03, 0.0300 303,... etc are in the
set A, whereas 0,0300403 is not in the set Ä.
a) Ube diagonalization process to explain why
A is not a countable subset of (0,1)
b) List an infinite number of rationals that
are in the set A
Transcribed Image Text:(5 Let A be the set of all real numbers in the interval (0,0) vehose decimal expansions contain only the digits "0" and "3". For example numbers 0.3, 0.03, 0.0300 303,... etc are in the set A, whereas 0,0300403 is not in the set Ä. a) Ube diagonalization process to explain why A is not a countable subset of (0,1) b) List an infinite number of rationals that are in the set A
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