Operation Manual

2-8 Math, Angle, and Test Operations
8202MATH.DOC TI-82, Chapter 2, English Bob Fedorisko Revised: 02/09/01 12:20 PM Printed:
02/09/01 12:36 PM Page 8 of 16
solve(
solve(
(
MATH MATH
item
0
) returns a solution (root) of
expression
for
variable
, given an initial
guess
, a
lower
bound, and an
upper
bound within
which a solution is sought (optional, if not specified,
lower
=
.
1
E
99 and
upper
=1
E
99).
solve(
expression
,
variable
,
guess
)
or
solve(
expression
,
variable
,
guess
,{
lower
,
upper
})
expression
is assumed equal to zero. The value of
variable
in memory will
not be updated.
guess
may be a value or a list of two values. Values must be
stored to every variable in
expression
, except
variable
, before
expression
is evaluated.
lower
and
upper
are entered in list format.
Controlling the Solution for solve(
The TI
.
82 solves equations through an iterative process. To control that
process, you should provide a close bound of the solution and at least one
initial guess (which must be within the bounds). This will help to:
¦
Find a solution.
¦
Define which solution you want for equations with multiple solutions.
¦
Find the solution more quickly.