Calcule os determinantes:
A) [-4 8 ] B) [ 8 √3 ]
[ 1 -3] [√3 -7] (URGENTE)
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Olá
A)
![~~~~~~ \left[\begin{array}{ccc}-4&8\\1&-3\\\end{array}\right] \\ \\ ((-4)\cdot(-3))-(1\cdot8) \\ ~~~ ~~~~~12~~~~~~~-~~~8 = \\ ~~~~~~~~~~ ~~~~~~~\boxed{\boxed{4}}](https://tex.z-dn.net/?f=+%7E%7E%7E%7E%7E%7E+%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-4%26amp%3B8%5C%5C1%26amp%3B-3%5C%5C%5Cend%7Barray%7D%5Cright%5D++%5C%5C++%5C%5C+%28%28-4%29%5Ccdot%28-3%29%29-%281%5Ccdot8%29+%5C%5C+%7E%7E%7E+%7E%7E%7E%7E%7E12%7E%7E%7E%7E%7E%7E%7E-%7E%7E%7E8+%3D+%5C%5C+++%7E%7E%7E%7E%7E%7E%7E%7E%7E%7E+%7E%7E%7E%7E%7E%7E%7E%5Cboxed%7B%5Cboxed%7B4%7D%7D "~~~~~~ \left[\begin{array}{ccc}-4&8\\1&-3\\\end{array}\right] \\ \\ ((-4)\cdot(-3))-(1\cdot8) \\ ~~~ ~~~~~12~~~~~~~-~~~8 = \\ ~~~~~~~~~~ ~~~~~~~\boxed{\boxed{4}}")
B)
![\left[\begin{array}{ccc}8& \sqrt{3} \\ \sqrt{3} &-7\\\end{array}\right] \\ \\ \\ (8\cdot(-7))-( \sqrt{3} \cdot \sqrt{3} ) \\ -57~~~~~-~ ~~\mathtt{( \diagup\!\!\!\!\!\sqrt{3} )^\diagup\!\!\!\!^2}~~~~~~~(cancela~ a~ raiz) \\ \\ -57-3 ~=~\boxed{\boxed{-60}}](https://tex.z-dn.net/?f=++%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D8%26amp%3B+%5Csqrt%7B3%7D+%5C%5C+%5Csqrt%7B3%7D+%26amp%3B-7%5C%5C%5Cend%7Barray%7D%5Cright%5D++%5C%5C++%5C%5C+++%5C%5C+%288%5Ccdot%28-7%29%29-%28+%5Csqrt%7B3%7D+%5Ccdot+%5Csqrt%7B3%7D+%29+%5C%5C+-57%7E%7E%7E%7E%7E-%7E+%7E%7E%5Cmathtt%7B%28+%5Cdiagup%5C%21%5C%21%5C%21%5C%21%5C%21%5Csqrt%7B3%7D+%29%5E%5Cdiagup%5C%21%5C%21%5C%21%5C%21%5E2%7D%7E%7E%7E%7E%7E%7E%7E%28cancela%7E+a%7E+raiz%29+%5C%5C++%5C%5C+-57-3+%7E%3D%7E%5Cboxed%7B%5Cboxed%7B-60%7D%7D "\left[\begin{array}{ccc}8& \sqrt{3} \\ \sqrt{3} &-7\\\end{array}\right] \\ \\ \\ (8\cdot(-7))-( \sqrt{3} \cdot \sqrt{3} ) \\ -57~~~~~-~ ~~\mathtt{( \diagup\!\!\!\!\!\sqrt{3} )^\diagup\!\!\!\!^2}~~~~~~~(cancela~ a~ raiz) \\ \\ -57-3 ~=~\boxed{\boxed{-60}}")
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A)
B)
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Quel220:
mt bom
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