Casio ClassPad II fx-CP400 Examples User Manual download pdf (Page 22)

Chapter 5: Differential Equation Graph Application 22

0508

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

matrix.

y’ = exp(x) + x

[0,1]

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’ = exp(x) + x

” on the eActivity application window

to select it.

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

• This draws the slope field of

y’ = exp(x) + x

and registers the equation in

the differential equation editor ([DiffEq] tab).

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

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

• This graphs the solution curve of

y’ = exp(x) + 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 22