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Division by which number is described as undefined?
AThe number zero
BThe number one
CThe number ten
DAny prime one
Answer & Solution
Correct answer: A. The number zero
1. One value can never sit in a denominator.
2. A rational expression is written as one expression over another.
3. Remember, division by 0 is undefined.
4. That is why some values must be excluded.
_Source: OpenStax Elementary Algebra 2e (CC BY 4.0), Ch 8 'Rational Expressions and Equations', sections 8.1-8.9_
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