Exam-style question
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Which conclusion follows directly from the fact that √2 is irrational?.
- A.√2 cannot be written as a fraction
- B.√2 must be a negative number
- C.√2 cannot be represented by a numerical symbol
- D.√2 is equal to zero
Model answer
What a good answer should say
- √2 cannot be written as a fraction
Explanation
Why this works
Since √2 is an example of an irrational number, it has the defining property that it cannot be written as a fraction.
Common mistake
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