Texas Instruments TI-89, TI-92 - page 66

Chapter 2: Operating the Calculator 49
02OPERDOC TI
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92Plus (English) SusanGullord Revised:02/23/01 1:06 PM Printed:02/23/01 2:11 PM Page49 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
¸
NUMj«1§
2™NUM
2ËNUMZ2
¸
NUM«1§
NUM
2ËNUMZ2
¸
¸¸ ¸¸
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.