How To Find Domain And Range Of A Function Using Interval Notation

Before getting into the topic of domain and range let s briefly describe what a function is.

How to find domain and range of a function using interval notation. Domain and range of a function explanation examples. Visit my website to view all of my math videos organized by course chapter and sectio. You can take a good guess at this point that it is the set of all positive real numbers based on looking at the graph.

Open parentheses closed parentheses infinity imagine an 8 sideways negative infinity an 8 sideways with a negative sign in front of it and union a symbol similar to an elongated u. Make a table of values on your graphing calculator see. Using interval notation the domain is infty infty backslash 1 2 3.

Updated video in hd here. Other strategies for finding domain of a function the alternative of finding the domain of a function by looking at potential divisions by zero or negative square roots which is the analytical way is by looking at the graph. Given a function in function notation form identify the domain and range using set notation interval notation or a verbal description as appropriate.

Another way to identify the domain and range of functions is by using graphs. In interval notation there are five basic symbols to be familiar with. Find the domain and range of a function with a table of values.

How to make a table of values on the ti89. From the above graph you can see that the range for x 2 green and 4x 2 25 red graph is positive.