HP 48gII Graphing Calculator Manual do Utilizador descarregar pdf (Página 344)

To enter matrix A you can activate the Matrix Writer while the A: field is

selected. The following screen shows the Matrix Writer used for entering

matrix A, as well as the input form for the numerical solver after entering

matrix A (press ` in the Matrix Writer):

Press ˜ to select the B: field. The vector b can be entered as a row vector

with a single set of brackets, i.e., [13,-13,-6] @@@OK@@@ .

After entering matrix A and vector b, and with the X: field highlighted, we can

press @SOLVE! to attempt a solution to this system of equations:

A solution was found as shown next.

To see the solution in the stack press `. The solution is x = [1,2,-1].

To check that the solution is correct, enter the matrix A and multiply times this

solution vector (example in algebraic mode):

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HP 48gII Graphing Calculator Manual do Utilizador Página 344