If You Get An Out-Of-Memory Error - Texas Instruments TI-89 Manual Book

If You Get an Out-of-Memory Error

Freeing Up Memory
Simplifying
Problems
The
TI-89 / TI-92 Plus
then deletes them when the calculation is complete. Depending
on the complexity of the calculation, the
out of memory before a result can be calculated.
¦
Delete unneeded variables and/or Flash applications, particularly
large-sized ones.
Use 2 ° as described in Chapter 21 to view and
delete variables and/or Flash applications.
¦
On the Home screen:
Clear the history area (ƒ
You can also use ƒ
that will be saved.
¦
Use 3 to set
Exact/Approx = APPROXIMATE
a large number of digits, this uses less memory than
For results that have only a few digits, this uses more memory.)
¦
Split the problem into parts.
Split
solve(aù b=0,var )
Solve each part and combine the results.
¦
If several undefined variables occur only in a certain
combination, replace that combination with a single variable.
If m and c occur only as
In the expression
cñ + cñ
use . In the solution, replace
1 ì cñ
¦
For expressions combined over a common denominator, replace
sums in denominators with unique new undefined variables.
In the expression
and use
añ +bñ + c
.
añ +bñ + c
¦
Substitute known numeric values for undefined variables at an
earlier stage, particularly if they are simple integers or fractions.
¦
Reformulate a problem to avoid fractional powers.
¦
Omit relatively small terms to find an approximation.
stores intermediate results in memory and
TI-89 / TI-92 Plus
) or delete unneeded history pairs.
8
9 to reduce the number of history pairs
into
solve(a=0,var )
mù cñ , substitute
(a+b)ñ + (a+b)ñ
, substitute
1 ì (a+b)ñ
c
x y
+
añ +bñ + c añ +bñ + c
x y
. In the solution, replace
+
d d
Chapter 3: Symbolic Manipulation
may run
. (For results that have
or .
AUTO EXACT
and .
solve(b=0,var )
e for mù cñ .
for and
c (a+b)
with .
(a+b)
, substitute for
d
with
d
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