HP 40G manual Plotting a piecewise defined function example, = , $3/ @ Select

Plotting a piecewise defined function example

Suppose you wanted to graph the following piecewise defined function.

	x + 2	;x ≤ – 1
	x2
f(x) = 		;– 1 < x ≤ 1
	4 – x	;x ≥ 1


1.Open the Function aplet.

>$3/( @ Select

67Function$57a￿

2.Highlight the line you want to use, and enter the expression. (You can press >'(/@ to delete an existing line, or >6+,)7@CLEAR to clear all lines.)

>￿@￿;a>￿@ 2 >￿@ >j@￿ >￿@ ;a>6+,)7@ CHARS ≤ ;a>￿￿￿@ 1 >￿@￿>(17(5@

>[￿@ >j@￿>￿@￿;a >6+,)7@CHARS > >￿￿￿@1 >6+,)7@ AND ;a >6+,)7@CHARS ≤ 1 >￿@ >(17(5@ >￿@￿4 >￿@￿;a>￿@￿>j@￿>￿@￿;a >6+,)7@CHARS > 1 >￿@￿>(17(5@

Note: You can use the ;a menu key to assist in the entry of equations. It has the same effect as pressing >;￿7￿5@.

Function aplet 3-11