Casio ClassPad II fx-CP400 Examples User Manual download pdf (Page 23)

Chapter 5: Differential Equation Graph Application 23

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1. Start up the eActivity application and input the following expression and

matrix.

y” + y’ = exp(x)

[[0,1,0][0,2,0]]

2. From the eActivity application menu, tap [Insert], [Strip(2)], and then

[DiffEqGraph].

• This inserts a Differential Equation Graph data strip, and displays the Differential Equation Graph window in

the lower half of the screen.

3. Drag the stylus across “

y” + y’ = exp(x)” on the eActivity application window

to select it.

4. Drag the selected expression to the Differential Equation Graph window.

• This registers

y” + y’ = exp(x) on the differential equation editor ([DiffEq]

tab). The Differential Equation Graph window contents do not change at

this time.

5. Drag the stylus across “[[0,1,0][0,2,0]]” on the eActivity application window to

select it.

6. Drag the selected matrix to the Differential Equation Graph window.

• This graphs the solution curves of

y” + y’ = exp(x) in accordance with the

initial condition defined by the matrix, and registers the initial condition in

the initial condition editor ([IC] tab).

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Casio ClassPad II fx-CP400 Examples User Manual Page 23