HP 40gs, User Manual

Page: 196 / 444

14-14 Computer Algebra System (CAS)
Example 2
Typing:
SUBST(QUOTE(CONJ(Z)),Z=1+i)
gives:
CONJ(1+i)
STORE
Store an object in a variable
STORE stores an object in a variable.
STORE is found in the ALGB menu or the Equation Writer
menu bar.
Example
Type:
STORE(X
2
-4,ABC)
or type:
X
2
-4
then select it and call STORE , then type ABC , then press
ENTER to confirm the definition of the variable ABC .
To clear the variable, press VARS in the Equation Writer
(then choose PURGE on the menu bar), or select
UNASSIGN on the ALGB menu by typing, for example,
UNASSIGN(ABC)
|
Substitute a value for a variable
| is an infix operator used to substitute a value for a
variable in an expression (similar to the function
SUBST ).
| has two parameters: an expression dependent on a
parameter, and an equality (parameter=substitute value).
| substitutes the specified value for the variable in the
expression.
Typing:
gives:
X
2
1 –
X 2 =
2
2
1 –
hp40g+.book Page 14 Friday, December 9, 2005 1:03 AM