HP 32SII User Manual
Page 319
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about
Solving
C–5
File name 32sii-Manual-E-0424
Printed Date : 2003/4/24 Size : 17.7 x 25.2 cm
Keys: Display: Description:
{
G
Selects Equation mode.
K
X
0
2
K
X
6
%:-%.
Enters the equation.
{
/
)
Checksum and length.
Cancels Equation mode.
Now, solve the equation to find its positive and negative roots:
Keys: Display: Description:
0
H
X 10
_
Your initial guesses for the
positive root.
{
G
%:-%.
Selects Equation mode;
displays the equation.
{
X
#
%/)
Calculates the positive root
using guesses 0 an 10.
9
)
Final two estimates are they
same.
9
{
)
f(x) = 0.
0
H
X 10
_
.
_
Your initial guesses for the
negative root.
{
G
%:-%.
Redisplays the equation.
{
X
#
%/.)
Calculates negative root
using guesses 0 and –10.
9
9
{
)
f(x) = 0.
Certain cases require special consideration:
If the function's graph has a discontinuity that crosses the x–axis, then the
SOLVE operation returns a value adjacent to the discontinuity (see figure
a, below). In this case, f(x) may be: relatively large.
Values of f(x) may be approaching infinity at the location where the
graph changes sign (see figure b, below). This situation is called a pole.
Since the SOLVE operation determines that there is a sign change