HP Prime Graphing Wireless Calculator Uživatelský manuál Strana 201

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2.
Highlight the blank denition following GC and tap .
When creating objects that are dependent on other objects, the order in which they appear in Symbolic
view is important. Objects are drawn in Plot view in the order in which they appear in Symbolic view.
Since we are about to create a new point that is dependent on the attributes of GB and GC, it is important
that we place its denition after that of both GB and GC. That is why we made sure we were at the
bottom the list of denitions before tapping . If the new denition appeared higher up in
Symbolic view, the point created in the following step would not be active in Plot view.
3.
Tap and choose Point > point.
You now need to specify the x and y coordinates of the new point. The former is dened as the abscissa
of point B (referred to as GB in Symbolic view) and the latter is dened as the slope of tangent line C
(referred to as GC in Symbolic view).
4. You should have point() on the entry line. Between the parentheses, add:
abscissa(GB),slope(GC)
For the abscissa command, press and tap . Press to jump to commands that
start with the letter A and then scroll to abscissa and tap . For the slope command, press
and tap . Press to jump to commands that start with the letter S and then
scroll to
slope and tap . Of course, you can type the commands in letter by letter as well. Press
for the lower-case alpha lock. Press again to unlock.
Getting started with the Geometry app 153
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