Question

(jia)3x3, com aij = i + j, e B = (bij)3x3, com bij = j – i, determine a matriz C, tal que C = A.B.

Answer 1

a 11=2     a 12= 3     a 13= 4                      
a21= 3     a22= 4      a23=5   
a31= 4     a32= 5      a33= 6


b11=0     b12= 1    b13= 2
b21= -1   b22=0     b23= 1
b31=-2    b32$\left[\begin{array}{ccc}2&3&4\\3&4&5\\4&5&6\end{array}\right] \left[\begin{array}{ccc}0&1&2\\-1&0&1\\-2&-1&0\end{array}\right] = \left[\begin{array}{ccc}-11&2&7\\-14&-2&10\\-17&-2&13\end{array}\right]$=-2    b33=0