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Question

If x is a rational number and y is an irrational number, then

A
Both x + y and xy are necessarily irrational
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B
Both x + y and xy are necessarily rational
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C
xy is necessarily irrational, but x + y can be either rational or irrational
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D
x + y is necessarily irrational, but xy can be either rational or irrational
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Solution

The correct option is D x + y is necessarily irrational, but xy can be either rational or irrational
If x is a rational number and y is an irrational number then sum of x+y is an irrational number.

Ifx is a rational number and y is an irrational number then xyxy can be rational or irrational number ,like 0 and 3

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