If x and y are two rational and irrational numbers respectively then which of the following are necessarily irrational.
A
x+y
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B
x−y
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C
xy
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D
All of the above
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Solution
The correct option is D All of the above Option D is correct Let x=2 and y=√3 x+y=2+√3 which is irrational x−y=2−√3 which is also irrational xy=2√3 which is also irrational All of them are irrational . So option D is correct