HP 39g Graphing Calculator Guide de l'utilisateur Page 156

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10-20 Using mathematical functions
QUOTE Encloses an expression that should not be evaluated
numerically.
QUOTE(expression)
Examples
QUOTE(SIN(45)) F1(X) stores the expression
SIN(45) rather than the value of SIN(45).
Another method is to enclose the expression in single
quotes.
For example, X^3+2*X
F1(X) puts the
expression X^3_2*X into F1(X) in the Function aplet.
| (
where
) Evaluates expression where each given variable is set to the
given value. Defines numeric evaluation of a symbolic
expression.
expression|(variable1=value1, variable2=value2,...)
Example
3*(X+1)|(X=3) returns 12.
Test functions
The test functions are logical operators that always return
either a 1 (true) or a 0 (false).
< Less than. Returns 1 if true, 0 if false.
value1<value2
Less than or equal to. Returns 1 if true, 0 if false.
value1value2
= = Equals (logical test). Returns 1 if true, 0 if false.
value1==value2
Not equal to. Returns 1 if true, 0 if false.
value1value2
> Greater than. Returns 1 if true, 0 if false.
value1>value2
Greater than or equal to. Returns 1 if true, 0 if false.
value1value2
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