HP NW280-200X User Manual page 424

To raise a matrix to
a power
To divide by a
square matrix
418
AQ 1 sA
Q 2 E
To multiply a matrix by a
vector, enter the matrix
first, then the vector. The
number of elements in
the vector must equal the
number of columns in the
matrix.
You can raise a matrix to any power as long as the power
is an integer. The following example shows the result of
raising matrix M1, created earlier, to the power of 5.
AQ 1 k
E
You can also raise a
matrix to a power without
first storing it as a
variable.
Matrices can also be
raised to negative
powers. In this case, the result is equivalent to 1/
[matrix]^ABS(power). In the following example, M1 is
raised to the power of –2.
kQ
A Q
1
E
2
For division of a matrix or a vector by a square matrix, the
number of rows of the dividend (or the number of
elements, if it is a vector) must equal the number of rows
in the divisor.
This operation is not a mathematical division: it is a left-
multiplication by the inverse of the divisor. M1/M2 is
–1
equivalent to M2
5
* M1.
Matrices