beautypg.com

Casio ClassPad II fx-CP400 Examples User Manual

Page 23

background image

Chapter 5: Differential Equation Graph Application

  23

0509

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).

LY777Ex_E.indb 23

13/02/25 11:24