HP 48g Graphing Calculator User Manual
Page 236
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1. Press OEM)
2. Select D i f f Eq.
3. Highlight ...STIFF
and press
TVPE:
Diff Eq
Deg
F: iFiV:
AFiT:
INDEP: K INIT: 0
FINPUS. 5
JDLN:
Y
INIT: 0
gSTIFF
USE STIFF DIFF EQ
SDLVERi
19
This screen has the same elements that the standard plot has plus the
following:
cji-cTfi; The partial derivative with respect to y of the expression
in F".
dFdT= The partial derivative with respect to t of the expression
in F:: .
1. Select STIFF.
2. Enter an ecpiation or press C H O O S to select an equation.
3. Enter the partial derivatives of the equation with respect to y and
t (or press C H O O S to select them if they are stored in memory).
4. Specify the independent variable.
5. Enter the initial value for the independent variable.
6. Enter the final value for the independent variable.
7. Specify the solution variable.
8. Enter the initial value for the solution variable.
9. Set desired options and view parameters.
10. Press E R
h
S E D
19-10 Differential Equations