HP 49g+ Graphing Calculator Manual de usuario Pagina 119

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Page 9-3
Operations with matrices
Matrices, like other mathematical objects, can be added and subtracted.
They can be multiplied by a scalar, or among themselves. An important
operation for linear algebra applications is the inverse of a matrix. Details of
these operations are presented next.
To illustrate the operations we will create a number of matrices that we will
store in the following variables. Here are the matrices A22, B22, A23, B23,
A33 and B33 (The random matrices in your calculator may be differents):
In RPN mode, the steps to follow are:
{2,2}` RANM 'A22'`K {2,2}` RANM 'B22'`K
{2,3}` RANM 'A23'`K {2,3}` RANM 'B23'`K
{3,2}` RANM 'A32'`K {3,2}` RANM 'B32'`K
{3,3}` RANM 'A33'`K {3,3}` RANM 'B33'`K
Addition and subtraction
Four examples are shown below using the matrices stored above (ALG mode).
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