HP Prime Graphing Wireless Calculator Manuale Utente Pagina 202

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5.
Tap .
The denition of your new point is added to Symbolic view. When you return to Plot view, you will see a
point named D and it will have the same x-coordinate as point B.
6.
Press .
If you can’t see point D, pan until it comes into view. The y coordinate of D will be the derivative of the
curve at point B.
Since it is diicult to read coordinates o the screen, we’ll add a calculation that will give the exact
derivative (to three decimal places) and which we can display in Plot view.
Adding some calculations
1.
Press .
Numeric view is where you enter calculations.
2.
Tap .
3.
Tap and choose Measure > slope.
154 Chapter 9 Geometry
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