In this post, we summarize the previous three articles about domain and range. In the first part of the series, we focused on the graphical meaning of domain and range. We have learned that the domain of a function can be interpreted as the projection of its graph to the x-axis. Similarly, the range of […]

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# High School Calculus

## Understanding Domain and Range Part 3

In the previous post, we have learned how to analyze equations of functions and determine their domain and range. We have observed that the range of the functions and are the set of real numbers greater than or equal to since squaring a number or getting its absolute value results to or a positive real […]

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## Understanding Domain and Range Part 2

In the previous post, we have learned the graphical representation of domain and range. The domain of the function is the shadow or projection of the graph of to the x-axis (see red segment in the figure below). The range of is the projection of the graph of to the y-axis (see green segment in […]

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