CSET Mathematics (211 212 213) Practice Questions - CSET Mathematics Subtests I, II, And III (211, 212, 213) Exam

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A standard proof that sqrt(2) is irrational assumes sqrt(2) = a/b in lowest terms and derives a contradiction. What is that contradiction?

Both a and b turn out to be even, contradicting lowest terms a must be negative b must equal zero a/b must be greater than 2

Correct Answer:

Both a and b turn out to be even, contradicting lowest terms

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