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Chapter 2: Operating the Calculator 49
02OPER DOC TI
-
89/TI
-
92 Plus: O
p
erating the TI
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89/TI
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92 Plus (English) SusanGullord Revised:02/23/01 1:06 PM Printed: 02/23/01 2:11 PM Page 49 of 44
When you press ¸ to evaluate an expression, the
TI
-
89 / TI
-
92 Plus
leaves that expression on the entry line and highlights it. You can
type over the entry, or you can reuse it as necessary.
For example, using a variable, find the square of
1
,
2
,
3
, etc.
As shown below, set the initial variable value and then enter the
variable expression. Next, reenter to increment the variable and
calculate the square.
On the TI
.
89: On the TI
.
92 Plus: Display
0
§
2™
NUM
¸
0
§
NUM
¸
NUM
j«
1
§
2™
NUM
2Ë
NUM
Z
2
¸
NUM
«
1
§
NUM
2Ë
NUM
Z
2
¸
¸¸ ¸¸
Reusing a Previous Entry or the Last Answer
You can reuse a previous entry by reexecuting the entry “as is”
or by editing the entry and then reexecuting it. You can also
reuse the last calculated answer by inserting it into a new
expression.
Reusing the
Expression on the
Entry Line
Tip: Reexecuting an entry
“as is” is useful for iterative
calculations that involve
variables.