Question

olá, preciso muito de ajuda por favorr

Answer 1

D[i,j] = A[i,j] + B[i,j] - C[i,j]

D[1,1] = A[1,1] + B[1,1] - C[1,1] = 1 + (-7) - 2 = -8
D[1,2] = A[1,2] + B[1,2] - C[1,2] = 2  + (-8) -3 = -9
D[1,3] = A[1,3] + B[1,3] - C[1,3] = 3 + 9 - (-4) = 16
D[2,1] = A[2,1] + B[2,1] - C[2,1] = -4 +12-6 = 2
D[2,2] = A[2,2] + B[2,2] - C[2,2] = 5 +6 -7 = 4
D[2,3] = A[2,3] + B[2,3] - C[2,3] = 6 +5 -1 = 11
D[3,1] = A[3,1] + B[3,1] - C[3,1] = 4+8 -2 = 10
D[3,2] = A[3,2] + B[3,2] - C[3,2] = 6+7-8 = 5
D[3,3] = A[3,3] + B[3,3] - C[3,3] = 8+4 -7 = 5



Então a matriz vai ficar assim 

$\left[\begin{array}{ccc}-8&-9&16\\2&4&11\\10&5&5\end{array}\right]$