HP Prime Graphing NW280AAABA manual AQ1sA, AQ1k5, AQ1kQ

To multiply two matrices

To raise a matrix to a power

To divide by a square matrix

To multiply the two matrices that you created for the previous example, press the following keys:

AQ1sA

Q2E

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.

AQ1k5

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.

AQ1kQ

2E

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.

Matrices 471