Texas Instruments TI-30XIIB Owners Manual - Page 23

Texas Instruments TI-30XIIB Manual

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A closed parenthesis can also supply a missing El En operand. For instance. 3 gives 6. The ) used the display value 3 for the missing operand. Example: 4 x (Si 9) (7 - 4y' ' = .23045268 Key in this expression and follow the path to completion Enter Press 4 [ k][L] 5 9 Li] LE 7 C:3 4 [L1 171r] 0 2 3 [17-- ] Display Comments 4. (4 x) stored pending evaluation of parentheses 5. (5+) stored 14. (5 + 9) evaluated 56. Hierarchy evaluates 4 x 14 56. (56 ) stored pending evaluation of parentheses 7. (7-) stored 3 (7 - 4) evaluated 3 Prepares for exponent 2. 5. .23045268 (2 + 3) evaluated (7 - 4).5 3' evaluated then divided into 4 (5 9) There are limits on how many operations and associated numbers can be stored. Actually, as many as fifteen parentheses can be open at any one time and four operations can be pending. but only in the most complex situations would these limits be approached. One or more leading parentheses shift the level of processing to the second level allowing for only 3 pending operations. If you do attempt to open more than 15 parentheses or if the calculator tries to store more than four operations, the error message appears in the display. The following example, requiring the storage of 4 operations, shows the order of interpretation provided by the calculator's operating system. 21

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A
closed
parenthesis
can
also
supply
a
missing
operand.
For
instance.
3
El
En
gives
6.
The
)
used
the
display
value
3
for
the
missing
operand.
Example:
4
x
(Si
9)
(7
—
4y'
'
=
.23045268
Key
in
this
expression
and
follow
the
path
to
completion
Enter
Press
Display
Comments
4
[
k][L]
4.
(4
x)
stored
pending
evaluation
of
parentheses
5
5.
(5+)
stored
9
Li]
14.
(5
+
9)
evaluated
56.
Hierarchy
evaluates
4
x
14
LE
56.
(56
)
stored
pending
evaluation
of
parentheses
7
C:3
7.
(7-)
stored
4
[L1
3
(7
—
4)
evaluated
171r]
0
3
Prepares
for
exponent
2
2.
3
5.
(2
+
3)
evaluated
[1-
-
7]
.23045268
(7
-
4).5
3'
evaluated
then
divided
into
4
(5
9)
There
are
limits
on
how
many
operations
and
associated
numbers
can
be
stored.
Actually,
as
many
as
fifteen
parentheses
can
be
open
at
any
one
time
and
four
operations
can
be
pending.
but
only
in
the
most
complex
situations
would
these
limits
be
approached.
One
or
more
leading
parentheses
shift
the
level
of
processing
to
the
second
level
allowing
for
only
3
pending
operations.
If
you
do
attempt
to
open
more
than
15
parentheses
or
if
the
calculator
tries
to
store
more
than
four
operations,
the
error
message
appears
in
the
display.
The
following
example,
requiring
the
storage
of
4
operations,
shows
the
order
of
interpretation
provided
by
the
calculator's
operating
system.
21