Advertisement
The value
of x for which
f(x)
:
0 is called
a root
of
the equation.
The
Solver
iteratively
seeks
a root for
f(x)
by
evaluating
the function
re-
peatedly
at
estimates
of x,
and comparing the results to
previous
estimates.
Using
a
complex
algorithm, the Solver intelligently "pre-
dicts' a new
estimate
where the graph might
cross
the
r-axis.
Figure B-1
illustrates the function
f(x):
-2x3
+ 4x2
5x
+
8. The
gpaph
shows
one
root. (The first
example
on page
212 calculates
this
root.)
t(x)
\t
I
5
Figure B-l
. flrl
:
-2x3
+
4r2
-
6r +
8
\-
'\-,
208
B:
tore
About the Solver
Advertisement
