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In the proof of (\sqrt{3}), if (u) is not divisible by (3), what conflict occurs from (u^2=3v^2)?

Answer and explanation

Correct answer: (u^2) should not be divisible by (3), but the equation makes it divisible

The direct answer is A. If u is not divisible by 3, then its square u squared is also not divisible by 3, because squaring cannot create a missing prime factor. But the equation u squared equals 3v squared has an explicit factor 3 on the right-hand side, so the right side is divisible by 3. Equality would then force u squared to be divisible by 3, producing a contradiction. Option A correctly states this conflict. Option B, v=0, does not follow; in a fraction denominator is nonzero anyway. Option C, u=v, is unrelated to the equation and is not required. Option D, square root of 3 equals zero, is false and is not the contradiction used. The proof works by comparing divisibility facts, not by claiming arbitrary values are zero or equal. Memory cue: no factor 3 in u means no factor 3 in u squared, but the equation supplies one.

Related tags

Number-SystemsDivisibilitySqrt3Hard

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