04-23-2004, 01:08 PM

Hello,

I have the Hp49G calculator and I have a problem:

There is no problem writing [[1,2,3][4,5,6]*[[7,8][9,10][11,12]]

and the calculator gives[[58,64][139,154]].

But if the two matrix are two vectors ((n*1) and (1*n)) the multiplication insn't possible. [ERROR: invalid dimension!!!]

(instead I should obtain a number).

How can I do for solve this operation?