Sharp EL-9900 operation manual 198

Chapter 12: The SOLVER Feature

Graphic method The Graphic method is another way of approximating solutions, using graphical representations. This method is particularly useful when finding more than one solution on a graph axis.

Example

Obtain values for “Y = X3 – 3X2 + 1”, when Y = 0.

1.Press @'to enter SOLVER. Clear screen entries by pressing Cseveral times.

2.Enter “Y = X3 – 3X2 + 1” into the initial window, and press

E.

3.In the next window, set the Y value as “0”, and press

E. The right side value of the equation is now set.

Note: Unlike in the Newton’s method, the X value will not be assumed as the starting point for the Graphic method.

4.Before proceeding further, you will need to set the SOLVER to the Graphic method. Press @' to call up the SOLVER menu, and press A(for

“A METHOD”), then 3(for “3 Graphic”). The Graphic method is now set.

5.Press @hto proceed.

6.Next in the following window, specify the range of analysis that will incorporate all possible solution. In this example, we will set the beginning point at “-1”, and

the end point at “3”. Press Eat each variable entry.

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