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Assuming that \(\sqrt{3}\) is irrational, which of the following numbers must be irrational?

Answer and explanation

Correct answer: \(\sqrt{3}+5\)

\(\sqrt{3}+5\) is irrational. If it were rational, subtracting the rational number 5 would make \(\sqrt{3}\) rational, which is impossible. The other expressions equal 3, 1, and 5. Exam tip: a rational number plus an irrational number is always irrational.

Related tags

Number SystemsIrrational NumbersSquare Root 3Proof Of IrrationalityRational NumbersProof Of Irrationality Of Square Root 2 And Square Root 3MathematicsClass 9 Mcq

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