Texas Instruments 83PL/CLM/1L1/V - 83 Plus Calc, Manual Book

Page: 81 / 827

TI-83 Plus Math, Angle, and Test Operations 78
Controlling the Solution for Solver or solve(
The TI-83 Plus solves equations through an iterative process. To control
that process, enter bounds that are relatively close to the solution and
enter an initial guess within those bounds. This will help to find a solution
more quickly. Also, it will define which solution you want for equations
with multiple solutions.
Using solve( on the Home Screen or from a Program
The function
solve(
is available only from
CATALOG
or from within a
program. It returns a solution (root) of
expression
for
variable
, given an
initial
guess
, and
lower
and
upper
bounds within which the solution is
sought. The default for
lower
is L 1
â
99. The default for
upper
is 1
â
99.
solve(
is valid only for real numbers.
solve( expression , variable , guess
[
,{ lower , upper }
]
)
expression
is assumed equal to zero. The value of
variable
will not be
updated in memory.
guess
may be a value or a list of two values. Values
must be stored for every variable in
expression
, except
variable
, before
expression
is evaluated.
lower
and
upper
must be entered in list format.