Determine all values of x at which the function is discontinuous. 
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Definitions:
Independent Variable
Factors in an experiment that are deliberately changed to test their impact on outcomes, observed through changes in the dependent variable.
Mean Square Error
A metric used to measure the average of the squares of the errors, indicating the discrepancy between estimated and actual values.
Dependent Variable
In a study or experiment, this is the variable anticipated to vary as a result of alterations in the independent variable.
Independent Variable
A variable in an experiment that is manipulated or changed by the researcher to observe its effect on the dependent variable.
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