Sharp EL-9900 Operation Manual page 208

Chapter 12: The SOLVER Feature
Graphic method
Note:
198
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 = X
1. Press @ ' to enter SOLVER. Clear screen entries by
pressing C several times.
–
3
2. Enter "Y = X
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.
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 @ h to 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 "
the end point at "3". Press E at each variable entry.
– +
3 3X 2 1", when Y = 0.
+
2
3X 1" into
-
1", and