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For the graph of the function \(y=\frac{x-1}{x+2}\), which value of \(x\) is not included in its domain?

Answer and explanation

Correct answer: \(x=-2\)

The denominator of a rational function cannot be zero because division by zero is undefined. Setting \(x+2=0\) gives \(x=-2\), so this value is excluded from the domain. For the other given values, the denominator is non-zero, so they belong to the domain. Exam tip: To find excluded values of a rational function, set its denominator equal to zero.

Related tags

Domain Of FunctionsRational FunctionsGraphs Of Standard FunctionsReal Valued FunctionsTheir Domain And RangeReal Valued Functions Their Domain And RangeRelations And FunctionsMathematicsClass 11 Mcq

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