Question

Determine a matriz b=(bij) 3x2 em que b i j =4i-3j

Answer 1

B = (Bij) 3x2

$B = \left[\begin{array}{ccc}b11&b12\\b21&b22\\b31&b32\end{array}\right]$

bij = 4i - 3j

b11 = 4.(1) - 3.(1)
b11 = 4 - 3
b11 = 1

b12 = 4.(1) - 3.(2)
b12 = 4 - 6
b12 = -2

b21 = 4.(2) - 3.(1)
b21 = 8 - 3
b21 = 5

b22 = 4.(2) - 3.(2)
b22 = 8 - 5
b22 = 3

b31 = 4.(3) - 3.(1)
b31 = 12 - 3
b31 = 9

b32 = 4.(3) - 3.(2)
b32 = 12 - 6
b32 = 6

$B = \left[\begin{array}{ccc}1&-2\\5&3\\9&6\end{array}\right]$