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This is a
case
2c
solution
becaus e
f(x) has
the
same
sign
for both
esti_
mates. Howeveq,
LEFT
and RIGHT are very
close
together and the
final
estimates are neighbors.
It
appears
that the Solvlr
has
found
an
accurate
root. Figure B-9 shows that the function is never
negative,
but dips to the
x-axis
at
r - \E
LEFT-R/GHT does not
"q,ruf
0
be_
cause
V2
cannot be
expressed
exactly
in lZ
digits.
t(x)
-5
-2
-1
1
I
2
Figure B-9. A
ilinimum at the
X-Aris
Gase
3:
Bad Guesses
If
both initial
guesses
are outside
the domain
in
which
f(x)
is defined,
the
Solver cannot use them.
In
this
case,
the
HP-27S displays:
BHU
GUESSES
I
PRESS
ECLR] TO
UIEl,I
Example: A Gase
3 Situation.
Find the root
of
the
equation:
.5:0
l.
press
ltsoutEl,
then
ffi.
2.
Typ"SART(X+LH(H))-,5=Bm-pUfll
.
B:
llore
About the Solyer
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