hp40g+.book Page 18 Friday, December 9, 2005 1:03 AM

 

Examples

 

 

ISOLATE(2*X+8,X) returns -4

 

ISOLATE(A+B*X/C,X) returns -(A*C/B)

LINEAR?

Tests whether expression is linear for the specified

 

variable. Returns 0 (false) or 1 (true).

 

LINEAR?(expression, variable)

 

Example

 

 

LINEAR?((X^2-1)/(X+1),X) returns 0

QUAD

Solves quadratic expression=0 for variable and returns

 

a new expression, where variable=newexpression. The

 

result is a general solution that represents both positive

 

and negative solutions by including the formal variable

 

S1 to represent any sign: + or – .

 

QUAD(expression, variable)

 

Example

 

 

QUAD((X-1)2-7,X) returns (2+s1*(2*√7))/2

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.

13-18

 

 

Using mathematical functions