Solvevx, Subst – HP 49g Graphing Calculator User Manual
Page 181
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SOLVEVX
Description:
Finds zeros of an expression with respect to the cun-ent
variable, or solves an equation with respect to the
ciuxent variable. (You use the CAS modes input fonn to
set the ciuTent variable.)
Access:
Symbolic solve, 0{Ssj3
Input:
A fmiction or equation in tire current variable.
Output:
A list of zeros or solutions.
Flags:
For a symbolic result, clear the CAS modes Numeric
option (flag -03 clear).
If Exact mode is set (flag -105 clear) and there are no
exact solutions, the command returns a null list even
when there are approximate solutions.
Example:
Solve the following expression for 0, where X is the
default variable on tlie calculator:
Type:
Command
Command:
SOLVEVX ( X " 3 - X - 9 )
Result:
{ X = 2 . 2 4 0 0 }
Note that if exact mode is set, this example returns a
null list as there are no exact solutions to the equation.
See also:
SOLVE
SUBST
Type:
Description:
Access:
Input:
Output:
Flags:
Function
Substitutes a value for a variable in an expression. The
value can be numeric or an expression.
Algebra, 0®
Level 2/Argmnent 1: An expression.
Level 1/Argument 2: The value or expression to be
substituted.
The expression with the substitution made.
Exact mode must be set (flag -105 clear).
Numeric mode must not be set (flag -03 clear).
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Computer Algebra Commands