Domains

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Domains can be entered for most functions using one of two formats.

 

1.        Using greater than, less than, greater than or equal to and less than or equal to signs.  These are typed after a semicolon (or colon if you use a , as a decimal point) after the function when entering functions in the Quick Entry screen.

 

For example:

 

fxgclip0230

 

 

 

 

2.        You can also enter domains using bracket notation, (-2,3] for example.  Parentheses indicate > or < and square brackets £ or ³.  This style of domain is quicker to use and does not require a semicolon (or colon).

 

For example:

 

fxgclip0231

 

When using bracket notation you can use braces ( { and } ) to control the domain but mark the end points with ARROWS. For example, entering x2-4 {-3,3} will produce this graph.

 

clip1226

 

Constants

 

Domains can contain constants which are discussed later in this manual.  You can have a domain of [-3a,b) for example.

 

Regional Issues

 

If you use a comma as a decimal point (eg 3,2) you must enter domains either as

 

x2 : -2<=x<2

or

x2  [-2;2)