Determine the domain on which the following function is decreasing.

Using function concepts, it is found that the domain in which the function is decreasing is:

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The domain of a function is composed by it's input values, in a graph the x-values.The function is decreasing when y decreases as x increases.

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The arrows in the graph indicates that the function goes from negative infinity to positive infinity.The graph, that is, y is falling for x between negative infinity and 2.Thus, the domain for which the function is decreasing is given by:

A similar problem is given at link

[Negative infinity, 2)