HP Prime Graphing NW280AAABA manual Function Variables, To find, Extremum, Quadratic

	Shortcut: When the Goto option is available, you can
	display the Go To screen simply by typing a number. The
	number you type appears on the entry line. Just tap
	to accept it.
To find the	1. To calculate the
extremum of the	coordinates of the
quadratic	extremum of the
	quadratic equation,
	move the tracing
	cursor near the
	extremum of interest
	(if necessary), tap
	and select
	Extremum.
	The coordinates of the extremum are displayed at the
	bottom of the screen.
N o t e
	The ROOT, INTERSECTION, and EXTREMUM operations
	return only one value even if the function in question has
	more than one root, intersection, or extremum. The app
	will only return values that are closest to the cursor. You
	will need to move the cursor closer to other roots,
	intersections, or extrema if you want the app to calculate
	values for those.

The Function Variables

The result of each numerical analysis in the Function app is assigned to a variable. These variables are named:

•Root

•Isect (for Intersection)

•Slope

•SignedArea

•Extremum

The result of each new analysis overwrites the previous result. For example, if you find the second root of a quadratic equation after finding the first, the value of Root changes form the first to the second root.

122 Function app