Question

considere as matrizes a=[1234] e b=[4550], para as próximas três questões.

1-determine as matrizes transpostas a e b
2- calcule a-b
3-calcule a*b

da uma ajudinha ai, pfvr!

Answer 1

Questão 1)

$A=\left[\begin{array}{cccc}1&2&3&4\\\end{array}\right] ~~~~~~~\to ~~~~~~~~ A^{t} =\left[\begin{array}{cccc}1\\2\\3\\4\end{array}\right]$

$B=\left[\begin{array}{cccc}4&5&5&0\\\end{array}\right] ~~~~~~~\to ~~~~~~~~B^{t} =\left[\begin{array}{cccc}4\\5\\5\\0\end{array}\right]$

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Questão 2)

$A-B~=~\left[\begin{array}{cccc}1&2&3&4\\\end{array}\right] ~~-~~\left[\begin{array}{cccc}4&5&5&0\\\end{array}\right]\\ \\\\ A-B~=~[(1-4)~~(2-5)~~(3-5)~~(4-0)]= \\ \\\\ A-B~=~[-3~~-3~~-2~~~~4]$

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Questão 3)

$A\cdot B~=~\left[\begin{array}{cccc}1&2&3&4\\\end{array}\right] ~~\cdot~~\left[\begin{array}{cccc}4&5&5&0\\\end{array}\right]\\ \\ A~\cdot B~=~1\cdot 4~+~2\cdot 5~+~3\cdot 5~+~4\cdot0\\ \\ A~\cdot B~=~4+10+15+0\\ \\ A~\cdot B~=29$

:)

Answer 2

Resposta:

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