Hp 50g Graphing Calculator Manual do Utilizador descarregar pdf (Página 329)

Addition and subtraction

Consider a pair of matrices A = [a

. Addition and

subtraction of these two matrices is only possible if they have the same number

of rows and columns. The resulting matrix, C = A ± B = [c

has elements c

. Some examples in ALG mode are shown below using the matrices

stored above (e.g., @A22@ + @B22@)

In RPN mode, the steps to follow are:

22 ` B22`+ 22 ` B22`-

23 ` B23`+ 23 ` B23`-

32 ` B32`+ 32 ` B32`-

Translating the ALG examples to RPN is straightforward, as illustrated here. The

remaining examples of matrix operations will be performed in ALG mode only.

Multiplication

There are numerous multiplication operations that involve matrices. These are

described next.

Multiplication by a scalar

Multiplication of the matrix A = [a

by a scalar k results in the matrix C =

. In particular, the negative of a matrix is defined by

the operation -A =(-1)A = [-a

. Some examples of multiplication of a

matrix by a scalar are shown below.

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