Question

Escreva uma matriz B= bij (2x3), tal que bij=2i-j. Me ajudem por favor!

Answer 1

$2X3 : \\ \\ \left[\begin{array}{ccc}b11&b12&b13\\b21&b22&b23\\\end{array}\right] \\ \\ b11 = 2.1-1 = 1 \\ b12 = 2.1-2 = 0 \\ b13 = 2.1-3 = -1 \\ b21 = 2.2 - 1 = 3 \\ b22 = 2.2-2 = 2 \\ b23 = 2.2 - 3 = 1 \\ \\ \left[\begin{array}{ccc}1&0&-1\\3&2&1\\\end{array}\right]$

Answer 2

B = bij 2x3 : 

[b11 b12  b13]
[b21 b22  b23]

bij = 2i-j
b11 = 2.1 - 1 = 2 - 1 = 1
b12 = 2.1 - 2 = 2 - 2 = 0
b13 = 2.1 - 3 = 2 - 3 = -1
b21 = 2.2 - 1 = 4 -1 = 3
b22 = 2.2 - 2 = 4 - 2 = 2
b23 = 2.2 - 3 = 4 - 3 = 1

[1  0  -1]
[3  2   1]