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In the proof of (\sqrt{2}), (a) has been proved even and (\frac{a}{b}) is in lowest form. What is the most correct next step?

Answer and explanation

Correct answer: Prove (b) even by substituting in the equation

Step 1: Getting only (a) even does not create contradiction with the coprime condition. Step 2: Substitute (a=2k) in (a^2=2b^2) to get (b^2=2k^2), then prove (b) even. Step 3: Contradiction occurs only when both have common factor (2).

Related tags

Sqrt2 ProofProof OrderHardClass 10Proof Of Irrationality Of √2√3√5Proof Of Irrationality Of 2 3 5Real NumbersMathematics

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