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What is the vertical asymptote of the graph of y = 1/(x − 4)?

Answer and explanation

Correct answer: x = 4

The governing concept is the vertical asymptote of a rational function. A vertical asymptote occurs at a value of x where the denominator becomes zero, provided the numerator does not cancel that factor. For y = 1/(x − 4), set the denominator equal to zero: x − 4 = 0, so x = 4. As x approaches 4 from either side, the denominator approaches zero and the function values become unbounded, confirming the vertical asymptote. The numerator is the nonzero constant 1, so no cancellation occurs. x = −4 would make the denominator −8, not zero; y = 4 is a horizontal line, and y = 0 is the horizontal asymptote, not the vertical one.

Related tags

Rational-FunctionsVertical-AsymptoteGraphsGraphs Of Standard FunctionsRelations And FunctionsMathematicsClass 11 Mcq

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