HP 15c Collector's Edition User Manual

Section 12: Calculating with Matrices 139
Keystrokes Display
| " 8
Deactivates Complex
mode.
2 v ´ m A
2.0000
Dimensions matrix A to be
2 × 2.
´ > 1
2.0000
Prepares for automatic
entry of matrix elements
in User mode.
´ U
2.0000
(Turns on the USER
annunciator.)
3.8 O A
A 1,1
Denotes matrix A, row 1,
column 1. (A display like
this appears momentarily
as you enter each element
and remains as long as you
hold the letter key.)
3.8000
Stores a
11
.
7.2 O A
7.2000
Stores a
12
.
1.3 O A
1.3000
Stores a
21
.
.9 ” O A
-0.9000
Stores a
22
.
2 v 1 ´ m B
1.0000
Dimensions matrix B to be
2 × 1.
16.5 O B
16.5000
Stores b
11
.
22.1 ” O B
-22.1000
Stores b
21
.
´ < C
-22.1000
Designates matrix C for
storing the result.
Using matrix notation, the solution of the matrix equation AX = B is
X = A
−1
B
where A
−1
is the inverse of matrix A. You can perform this operation by
entering the “descriptors” for matrices B and A into the Y- and X-registers
and then pressing ÷. (A descriptor shows the name and dimensions of
a matrix.) Note that if A and B were numbers, you could calculate the
answer in a similar manner.

HP 15c Collector's Edition Specifications

General

Brand	HP
Model	15c Collector's Edition
Category	Calculator
Language	English