D–12 More about Solving
Now attempt to find a negative root by entering guesses 0 and –10. Notice that
the function is undefined for values of
x between 0 and –0.3 since those values
produce a positive denominator but a negative numerator, causing a negative
square root.
Keys: Display: Description:
0
I
X
10
^
.
_
|H
!1%ª1%-)22
Selects Equation mode;
displays the left end of the
equation.
X
!
No root found for f(x).
Clears error messa
e; cancels
Equation mode.
|
X
%/
)
Displays the final estimate of
x.
Example: A Local "Flat" Region.
Find the root of the function
f(x) = x + 2 if x
<
–1,
f(x) = 1 for –1
≤
x
≤
1 (a local flat region),
f(x) = –x + 2 if x
>
1.
In RPN mode, enter the function as the program:
!
- %
º6¸@
!
.
-+.
º5¸@
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