Texas Instruments TI-84 - Manual (Page 133)

Chapter 3: Function Graphing 130
2. Press
† or }, if necessary, to move the cursor to the first function, and then press
Í.
Second curve? is displayed in the bottom-left corner.
3. Press
† or }, if necessary, to move the cursor to the second function, and then
press
Í.
4. Press
~ or | to move the cursor to the point that is your guess as to location of the
intersection, and then press
Í.
The cursor is on the solution and the coordinates are displayed, even if CoordOff format
is selected. Intersection is displayed in the bottom-left corner. To restore the free-moving
cursor, press
|, }, ~, or †.
dy/dx dy/dx dy/dx dy/dx
dy/dx (numerical derivative) finds the numerical derivative (slope) of a function at a point,
with H=1âL3.
To find a function’s slope at a point, follow these steps.
1. Select 6:dy/dx from the CALCULATE menu. The current graph is displayed.
2. Press
} or † to select the function for which you want to find the numerical
derivative.