Hp 49g Graphing Calculator Manuel d'utilisateur télécharger pdf (Page 140)

7. Return to the default screen. The results

matrix is written to the history.

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23.18181818

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11.

Solving difFerential equations

This section explains how to use the numeric solver to solve differential

equations.

1. Open the numeric solver and select solve diff eq to display the Solve

Equation input fonn.

2. Use the method described in “Solving an equation” on page 6-3 to

specify the equation.

3. Use the arrow keys to navigate to the fields and press edit. Tlie default

settings are for an equation where .r is a fimction of y. The fields are as

follows:

F: Holds the equation to be solved.

INDEP: Specifies the independent variable. This defaults to x.

INIT: Contains the initial value of the independent variable.

FINAL: Contains the independent variable’s final value.

SOLN: Specifies the solution variable. This defaults to y.

INIT: Contains the solution variable’s initial value.

FINAL: Displays the solution variable’s final value when the

equation is solved. You cannot edit this value.

TOL: Contains the acceptable level of absolute error. This

defaults to 0.0001.

STEP: Contains the initial step size to be used as the solver

attempts to find a solution.

STIFF Check this field when the solve process does not

work, or is taking a long time. It displays additional

fields where you can enter partial derivative

information in order to obtain a stiff solution. See the

Advanced User’s Guide for more information.

Page 6-10

Solving equations

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Hp 49g Graphing Calculator Manuel d'utilisateur Page 140