Texas TI-86 用户手册
Chapter 1: Operating the TI
-86
29
01OPER.DOC TI-86, Chap 1, US English Bob Fedorisko Revised: 02/13/01 2:18 PM Printed: 02/13/01 2:59 PM Page 29 of 22
01OPER.DOC TI-86, Chap 1, US English Bob Fedorisko Revised: 02/13/01 2:18 PM Printed: 02/13/01 2:59 PM Page 29 of 22
Retrieving Multiple Entries
To store two or more expressions or instructions together to
ENTRY
, enter them on one
line, separating each from the other with a colon, and then press b. Upon execution,
the entire group is stored in
the entire group is stored in
ENTRY
. The example below shows one of many ways you can
manipulate this feature to avoid tedious manual re-entry.
� Use trial and error to find the radius
of a circle with an area of 200 square
centimeters. Store
centimeters. Store
8
to
r
as your first
guess, then execute
p
r
2
.
8
X - n
ã
R
ä
- [
:
] - ~
ã
R
ä 1
1 I b
� Retrieve
8
¶
r:
p
r
2
and insert
7.958
as a
new guess. Continue guessing to
approach the answer of
approach the answer of
200
.
- ¢
- !
- !
7
- p `
958
b
Clearing the ENTRY Storage Area
To clear all data from the
ENTRY
storage area, begin on a blank line on the home screen,
select
ClrEnt
from the
MEM
menu (press - ™ *), and then press b.
Retrieving the Last Answer
When an expression is evaluated successfully on the home screen or in a program, the TI
-86
stores the answer to a built-in variable called
Ans
(last answer).
Ans
may be a real or
complex number, list, vector, matrix, or string. When you turn off the TI
-86, the value in
Ans
is retained in memory.
Consecutively entered entries
separated by colons (page 26)
are stored as one entry.
separated by colons (page 26)
are stored as one entry.
The formula for finding the
area of a circle is
area of a circle is
A=
p
r
2
.
The equation solver (Chapter
15) is another tool with which
you can perform this task.
15) is another tool with which
you can perform this task.