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If someone says (\sqrt{2}) is irrational because (2) is not a perfect square, what correction is appropriate at expert level?

Answer and explanation

Correct answer: It is a useful hint for understanding, but a full proof should assume rationality and show contradiction

Step 1: Since (2) is not a perfect square, (\sqrt{2}) is not an integer. Step 2: But irrationality needs proving it is not any rational fraction. Step 3: Therefore write the contradiction proof using a coprime fraction.

Related tags

Real-NumbersRoot2Perfect-SquareProof-DepthProof Of Irrationality Of √2√3√5Proof Of Irrationality Of 2 3 5Real NumbersMathematics

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