Casio ClassPad 101 User's Guide download pdf (Page 171)

Chapter 9: Numeric Solver Application 171

Chapter 9:

Numeric Solver Application

Numeric Solver application lets you obtain the value of any variable in an equation without transforming or

simplifying the equation.

Starting up the Numeric Solver displays the Numeric Solver window. The

screen to the right shows an example of the window with a sample

equation input.

1 Equation input area. Inputting an equation that includes variables and

then pressing E will cause 2 and 3 to appear.

2 Equation variables. Input the initial value of each variable to the right

of the equals sign (=). Specify the variable you want to solve for by

selecting the option button to the left of it.

3 Solution lower limit and upper limit input area*

4 Current convergence range setting*

* Values shown in the sample screen are initial defaults.

Numeric Solver Application-Specific Menus and Buttons

• Solve the input equation for the specified variable ...................................................... Solve - Execute or 1

• Clear all single-character variables (a through z)* ....................................................................a - Clear a–z

• Initialize the upper boundary and lower boundary ...........................................................a - Initialize Bound

• Change the convergence range .......................................................................................... a - Convergence

* Performing the “Clear a–z” operation clears all single-character variables, regardless of variable data type.

Programs and functions with file names from “a” through “z” are also cleared.

Inputting an Equation

On the Numeric Solver window, input a single equation into the area under “Equation”.

• Use the soft keyboard to input an equation that contains at least one variable.

• If you do not input an equals sign, the ClassPad assumes that the expression is to the left of the equals sign,

and there is a zero to the right.

Solving an Equation

Numeric Solver solves equations by calculating approximations based on Newton’s method. Because of this,

you should keep the following points in mind about its solutions.

• Even if an equation has multiple solutions, only one solution is obtained for a particular Numeric Solver

operation. For example, x

−1 = 0 has the two solutions 1 and −1. Numeric Solver will display either of the

solutions first, depending on the value specified by “Lower” and “Upper”.

• Solutions may include errors that are not actual solutions. The accuracy of solutions can be determined by

viewing the [Left–Right] value in the Result dialog box. The closer the [Left–Right] value is to zero, the more

accurate the results.

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Casio ClassPad 101 User's Guide Page 171