Question

Construa as seguintes matrizes: (bij) 3×3 tal que bij= i+2 j, se i ≠ j
i-3 j, se i= j

Answer 1

bij= i+2j, se i≠j
i-3j, se i=j

b11= 1-3.1= 1-3= -2
b12= 1+2.2= 1+4= 5
b13= 1+2.3= 1+6= 7

b21= 2+2.1= 2+2= 4
b22= 2-3.2= 2-6= -4
b23= 2+2.3= 2+6= 8

b31= 3+2.1= 3+2= 5
b32= 3+2.2= 3+4= 7
b33= 3-3.3= 3-9= -6

Logo a matriz bij 3x3 eigual à :

|-2 5 7|
|4 -4 8|
|5 7 -6|