HP 48gII Graphing Calculator Manuel d'utilisateur télécharger pdf (Page 332)

The inverse matrix

The inverse of a square matrix A is the matrix A

such that A⋅A

where I is the identity matrix of the same dimensions as A. The inverse of a

matrix is obtained in the calculator by using the inverse function, INV (i.e., the

Y key). An example of the inverse of one of the matrices stored earlier is

presented next:

To verify the properties of the inverse matrix, we present the following

multiplications:

Characterizing a matrix (The matrix NORM menu)

The matrix NORM (NORMALIZE) menu is accessed through the keystroke

sequence „´ (system flag 117 set to CHOOSE boxes):

This menu contains the following functions:

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HP 48gII Graphing Calculator Manuel d'utilisateur Page 332