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ankoles [38]
3 years ago
12

Escreva a matriz A = (aij) do tipo 3x4 sabendo que aij = 3i – 2j.

Mathematics
1 answer:
nikitadnepr [17]3 years ago
7 0

Answer:

A = \left[\begin{array}{cccc}1&-1&-3&-5\\4&2&0&-2\\7&5&3&1\end{array}\right]

Step-by-step explanation:

A = (aij)

i representa a linha e j a coluna.

Tipo 3x4

Isto implica que a matriz tem 3 linhas e 4 colunas.

aij = 3i – 2j.

Primeira linha:

a_{1,1} = 3(1) - 2(1) = 1

a_{1,2} = 3(1) - 2(2) = -1

a_{1,3} = 3(1) - 2(3) = -3

a_{1,4} = 3(1) - 2(4) = -5

Segunda linha:

a_{2,1} = 3(2) - 2(1) = 4

a_{2,2} = 3(2) - 2(2) = 2

a_{2,3} = 3(2) - 2(3) = 0

a_{2,4} = 3(2) - 2(4) = -2

Terceira linha:

a_{3,1} = 3(3) - 2(1) = 7

a_{3,2} = 3(3) - 2(2) = 5

a_{3,3} = 3(3) - 2(3) = 3

a_{3,4} = 3(3) - 2(4) = 1

Matriz:

A matriz é dada por:

A = \left[\begin{array}{cccc}1&-1&-3&-5\\4&2&0&-2\\7&5&3&1\end{array}\right]

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