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E-65
a
11
a
12
a
13
–1
a
21
a
22
a
23
a
31
a
32
a
33
=
a
22
a
33
– a
23
a
32
–a
12
a
33
+ a
13
a
32
a
12
a
23
– a
13
a
22
– a
21
a
33
+ a
23
a
31
a
11
a
33
– a
13
a
31
–a
11
a
23
+ a
13
a
21
a
21
a
32
– a
22
a
31
–a
11
a
32
+ a
12
a
31
a
11
a
22
– a
12
a
21
a
11
a
22
a
33
+ a
12
a
23
a
31
+ a
13
a
21
a
32
– a
13
a
22
a
31
– a
12
a
21
a
33
– a
11
a
23
a
32
Important!
• Matrix inversion is supported for a non-zero square matrix only.
• Use the
!
)
(
x
–1
) key to input “
–1
”.
Example: To invert the matrix
1 –2
5 0
.
This example assumes that Mat C contains
1 –2
5 0
.
Mat C
!
)
(
x
–1
)
E
A
Squaring a Matrix
You can use the procedure shown below to square a matrix.
Important!
Use the
x
key to specify the squaring operation.
Example: To square the matrix
1 –2
5 0
.
This example assumes that Mat C contains
1 –2
5 0
.
Mat C
x
E
Sequence Calculations (RECUR)
To perform the example operations in this section, fi rst select RECUR (
N
6
) as the
calculation mode.
k
Sequence Calculation Overview
You can use either of the two following sequence types to create a sequence table.
1
a
n
Type Sequence
With this sequence type, you input the general term of the sequence (
a
n
=
f
(
n
)), along
with a sequence start value and end value.
2
a
n
+1
Type Sequence
With this sequence type, you input the recursion formula for two-term recursion (
a
n
+1
=
f
(
a
n
)), along with a sequence start value and end value.