ICSE BoardEnglish MediumSTD 9MATHEMATICSIrrational Numbers3 Marks
Question
Write a pair of irrational numbers whose sum is irrational.
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Answer
$(\sqrt{3}+5)$ and $(\sqrt{5}-3)$ are irrational numbers whose sum is irrational.
Thus, we have
$(\sqrt{3}+5)+(\sqrt{5}-3) $
$=\sqrt{3}+5+\sqrt{5}-3$
$=\sqrt{3}+\sqrt{5}+2,$
which is irrational.
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