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Next, press the
L
key to recover the original Equation Writer menu, and
press the
@EVAL@
soft menu key (
D
) to evaluate this derivative. The result is:
Using the HELP menu
Press the
L
key to show the
@CMDS
and
@HELP
soft menu keys. Press the
@HELP
soft menu key to get the list of CAS commands. Then, press
~ d ˜ ˜
˜
to select the command DERVX. Press the
@@OK@@
soft menu key (
F
), to get
information on the command DERVX:
Detailed explanation on the use of the help facility for the CAS is presented in
Chapter 1. To return to the Equation Writer, press the
@EXIT
soft menu key.
Press the
`
key to exit the Equation Writer.
Using the editing functions BEGIN, END, COPY, CUT and PASTE
To facilitate editing, whether with the Equation Writer or on the stack, the
calculator provides five editing functions, BEGIN, END, COPY, CUT and
PASTE, activated by combining the right-shift key (
‚
) with keys (2,1), (2,2),
(3,1), (3,2), and (3,3), respectively. These keys are located in the leftmost
part of rows 2 and 3. The action of these editing functions are as follows:
BEGIN: marks the beginning of a string of characters for editing
END: marks the ending of a string of characters for editing
COPY: copies the string of characters selected by BEGIN and END
CUT:
cuts the string of characters selected by BEGIN and END
PASTE: pastes a string of characters, previously copied or cut, into the current
cursor position
To see and example, lets start the Equation Writer and enter the following
expression (used in an earlier exercise):
