Matrix functions and commands, Matrix functions and commands -9, About functions – HP 39g Graphing Calculator User Manual
Page 183
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Return to HOME and enter the calculation to left
multiply the constants vector by the inverse of the
coefficients matrix.
rHOMEirALPHAlM2
[
shif
TI.
y
'
0
F
alpha
IMI
7. Evaluate the calculation.
ENTER
The result is a vector of the
solutions:
•
.V =
2
•
y = 3
•
z = -2
iFUNCTia •
i;2,3,-2]
An alternative method, is to use the RREF function. See
“RREF” on page 12-12.
Matrix functions and commands
About functions
Functions can be used in any aplet or in HOME. They are
listed in the MATH menu under the Matrix category.
They can be used in mathematical
expressions—primarily in HOME—as well as in
programs.
Functions always produce and display a result. They do
not change any stored variables, such as a matrix
variable.
Functions have arguments that are enclosed in
parentheses and separated by commas; for example,
CROSS(vectorJ,vector!). The matrix input can be either
a matrix variable name (such as M
1
) or the actual matrix
data inside brackets. For example, CROSS(Ml,[l,2]).
Matrices
12-9