HP NW280AAABA Uživatelský manuál stáhnout pdf (Strana 478)

100

101

472 Matrices

This operation is not a mathematical division: it is a left-

multiplication by the inverse of the divisor. M1/M2 is

equivalent to M2

–1

* M1.

To divide the two

matrices you created for

the previous example,

press the following keys:

A Q1 n

A Q2

To invert a matrix You can invert a square matrix in Home view by typing the

matrix (or its variable name) and pressing

SnE. You can also use the INVERSE

command in the Matrix category of the Math menu.

To negate each

element

You can change the sign of each element in a matrix by

pressing

Q, entering the matrix name, and pressing

Solving systems of linear equations

You can use matrices to solve systems of linear equations,

such as the following:

2x+3y+4z=5

x+y–z=7

4x–y+2z=1

In this example we will use matrices M1 and M2, but you

could use any available matrix variable name.

1. Open the Matrix

Catalog, clear M1,

choose to create a

vector, and open the

Matrix Editor:

[press = or \ to

select M1]

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