Advanced MathEasyValue that makes a rational expression undefined
Advanced Math practice question
For which value of x is the expression 1/(x − 3) undefined?
- A. 3Correct
- B. −3
- C. 0
- D. 1/3
Answer: A. 3
The expression is undefined when the denominator is 0, which happens when x = 3.
Why the other answers are wrong
- B. −3
- x = −3 gives a denominator of −6.
- C. 0
- x = 0 gives a denominator of −3.
- D. 1/3
- x = 1/3 gives a nonzero denominator.
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