alleryStart learning →The expression with denominator x minus 3 is undefined when x equals:
AIt equals zero
BIt equals minus
CIt equals one
DIt equals three
Answer & Solution
Correct answer: D. It equals three
1. Find the input that makes the denominator vanish.
2. Division by 0 is undefined.
3. A rational expression is undefined where its denominator equals zero.
4. The denominator x minus 3 equals zero when x is 3.
5. So the expression is undefined at x equals three.
_Source: OpenStax Elementary Algebra 2e (CC BY 4.0), Ch 8 'Rational Expressions and Equations', sections 8.1-8.9_
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