# Linsolve; Lname; Lncollect - HP 48gII Advanced User's Reference Manual

Graphing calculator.

Input:
An expression.
Output:
The linearized expression.
Flags:
Exact mode must be set (flag –105 clear).
Numeric mode must not be set (flag -3 clear).
Radians mode must be set (flag –17 set).
Example:
Linearize the following expression:
y 4
x
x e
e
Command:
LIN(X*(EXP(X)*EXP(Y))^4)
Result:
X*EXP(4X+4Y)
TEXPAND

## LINSOLVE

Type:
Command
Description:
Solves a system of linear equations.
Symbolic solve, !Î, P
Access:
Input:
Level 2/Argument 1: An array of equations.
Level1/Argument 2: A vector of the variables to solve for.
Output:
Level 3/Item 1: The system of equations, as a list containing the inputs as above.
Level 2/Item 2: A list of the pivot points.
Level 1/Item 3: The solution.
Flags:
Exact mode must be set (flag –105 clear).
Numeric mode must not be set (flag -3 clear).
DESOLVE, SOLVE, MSLV

### LNAME

Type:
Command
Description:
Returns the variable names contained in a symbolic expression.
Catalog, ...µ
Access:
Input:
A symbolic expression.
Output:
Level 2/Argument 1: The original expression.
Level 1/Argument 2: A vector containing the variable names. The variable names are sorted
by length, longest first, and ones of equal length are sorted alphabetically.
Flags:
Exact mode must be set (flag –105 clear).
Numeric mode must not be set (flag -3 clear).
Example:
List the variables in the expression COS(B)/2*A + MYFUNC(PQ) + 1/T.
Command:
LNAME(COS(B)/2*A + MYFUNC(PQ) + INV(T))
Result:
{COS(B)/2*A + MYFUNC(PQ) + 1/T, [MYFUNC,PQ,A,B,T]}
LVAR

### LNCOLLECT

Type:
Command
Description:
Simplifies an expression by collecting logarithmic terms. For symbolic powers does not
perform the same simplification as EXP2POW; compare example 2 here with example 2 for
EXP2POW.
Algebra, ...×
Access:
Input:
An expression.
Output:
The simplified expression.
, !Ø
SOLVE
!Ð, or PL
,
-
LIN
S
, or !Ú
&
EXP
LN
Computer Algebra Commands 4-49
L
REWRITE