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Now, solve the equation to find its positive and negative roots:
Keys:
e
0
X 10
º d
Û
X
<
< º Î
e
0
X 10
º d
Û
X
< < º Î
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 between two
neighboring values of x, it returns the possible root. However, the value for f(x)
will be relatively large. If the pole occurs at a value of x that is exactly
represented with 12 digits, then that value would cause the calculation to halt
with an error message.
File name 33s-E-Manual-1008-Publication(1st).doc
Printed Date : 2003/10/8
Display:
_
z
_
Size : 13.7 x 21.2 cm
Description:
Your initial guesses for the
positive root.
Selects Equation mode; displays
the equation.
Calculates the positive root
using guesses 0 an 10.
Final two estimates are they
same.
f(x) = 0.
Your initial guesses for the
negative root.
Redisplays the equation.
Calculates negative root using
guesses 0 and –10.
f(x) = 0.
More about Solving
Page : 386
D–5
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