Mathematics, 02.01.2020 23:31 jacksonshalika
Determine whether each of these sets is countable or uncountable. for those that are countably infinite, exhibit a one-to-one correspondence between the set of positive integers and that set.
a) integers not divisible by 3.
b) integers divisible by 5 but not by 7.
c) the real numbers with decimal representations consisting of all 1s.
d) the real numbers with decimal representations of all 1s or 9s.
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Determine whether each of these sets is countable or uncountable. for those that are countably infin...
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