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Kisachek [45]
3 years ago
14

Dada a Matriz A= [1 -2 1 ][-3 1 4] [0 6 8] , escreva uma matriz B diferente de A, tal que detA =detB.

Mathematics
1 answer:
Mariulka [41]3 years ago
3 0

Use o fato de que o determinante de qualquer matriz quadrada é o mesmo da sua transposta.

\mathbf A=\begin{bmatrix}1&-2&1\\-3&1&4\\0&6&8\end{bmatrix}

\mathbf B=\mathbf A^\top=\begin{bmatrix}1&-3&0\\-2&1&6\\1&4&8\end{bmatrix}

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Yes, Sam and Lou have enough wire for science project.

Step-by-step explanation:

<u><em>There is some data missing in the question, so complete question is below:</em></u>

Sam\ and\ Lou\ need\ a\ total\ of\ 1\ foot\ of\ wire\ for\ science\ project.Sam's\ wire\ measured\ 8/12\ foot\ long.\ Lou's\ measured\ 7/8-\ foot \ \ long.Do\ they\ have\ enough\ wire\ for\ the\ science\ project?Explain \ your\ reasoning.

Now, to get that whether they have enough wire for the science project or not.

Measurement of Sam's wire = \frac{8}{12} \ foot.

Measurement of Lou's wire = \frac{7}{8}\ foot.

Now, adding both the wires of Sam and Lou:

\frac{8}{12} +\frac{7}{8} \\\\=\frac{16+21}{24} \\\\=\frac{37}{24}

=1\frac{13}{24} \ feet.

<em>As, Sam and Lou need a total of 1 foot of wire for the science project.</em>

<em>And, we see that the Sam's wire and Lou's wire combining gets </em>1\frac{13}{24}\ feet<em> which is</em> <em>more than 1 foot.</em>

<em>Thus, wire they have is enough for science project.</em>

Therefore, yes, Sam and Lou have enough wire for science project.

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