Texas Instruments TITANIUM TI-89 - Manual (Page 678)

Numeric Solver 678
Selecting a New Initial Guess from the Graph Selecting a New Initial Guess from the Graph Selecting a New Initial Guess from the Graph Selecting a New Initial Guess from the Graph
To use the graph cursor to select an initial guess:
1. Move the cursor (either free-moving or trace) to the point that you want to use as the
new guess.
Returning to a Full Screen Returning to a Full Screen Returning to a Full Screen Returning to a Full Screen
From the split screen:
• To display the Numeric Solver full screen, use 2 a to make the solver screen
active, press …, and then select
2:Clear Graph View .
– or –
• To display the Home screen, press 2 K twice.
2. Use 2 a to make the Numeric
Solver screen active.
3. Make sure the cursor is on the
unknown variable, and press †.
Note: Cursor coordinate xc is the
unknown variable value, and yc is the
leftNrt value.
4. Press „ to re-solve the equation.
†
sets the graph
cursor’s xc value as
an initial guess and
the yc value as left
N rt.
The graph’s xmin and
xmax values are set
as the bounds.