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Why is this uncountable..can't we use fact finite product of countable sets is countable in this question.
why is this uncountable..can't we use fact finite product of countable sets is countable in this question.
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Deepak singh 1![best-answer]()
take (π,1/π) belongs to R^2 and π×1/π = 1 which belongs to Z , thus it implies this set contains irrational no. also and irrational are uncountable , so given set is uncountable .
sir then it should also be uncountable as √8,√2 € R and their product is √(16)=4 € Q and since set of irrational numbers so uncountable ....but ans given is countable
sir pls tell my mistake..
wait..
it should be uncountable also , because this set is containing irrational also..
if you have any explanation proving countable then you please share..
ok sir .
feel free to ask again..
sir this explanation is there in book
but i did not got for option c and d
Dear , in option d , there is a,b not a.b
oohh..i got it sir..
since there is a,b . So it will be countable ..