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To reuse an
expression or result
from the CAS
38
the entry line as the first component of the new
calculation. For example, to multiply the last answer by
13, you could enter
first two keystrokes are unnecessary. All you need to enter
is
13
.
s
E
The variable Ans is always stored with full precision
whereas the results in history will only have the precision
determined by the current Number Format setting (see
page 28). In other words, when you retrieve the number
assigned to Ans, you get the result to its full precision; but
when you retrieve a number from history, you get exactly
what was displayed.
You can repeat the previous calculation simply by pressing
. This can be useful if the previous calculation
E
involved Ans. For example, suppose you want to calculate
the nth root of 2 when n is 2, 4, 8, 16, 32, and so on.
1. Calculate the square root of 2.
2
Sj
E
2. Now enter √Ans.
SjS+E
This calculates the fourth root of 2.
3. Press
E
repeatedly. Each time
you press, the root is
twice the previous
root. The last answer
shown in the
illustration at the right
is
.
32
2
When your are working in Home view, you can retrieve
an expression or result from the CAS by tapping
selecting Get from CAS. The CAS opens. Press
\
until the item you want to retrieve is highlighted and
press
E
. The highlighted item is copied to the cursor
point in Home view.
S+ s
13
E
. But the
and
Z
=
or
Getting started
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