Seja ![A = \left[\begin{array}{cccc}X&3,1&7,9&4,9\\5,2&4,5&5,8&6,3\\9,8&7,3&4,8&4,8\\5,9&3,7&5&4,9\end{array}\right]](https://tex.z-dn.net/?f=A+%3D+%5Cleft%5B%5Cbegin%7Barray%7D%7Bcccc%7DX%26amp%3B3%2C1%26amp%3B7%2C9%26amp%3B4%2C9%5C%5C5%2C2%26amp%3B4%2C5%26amp%3B5%2C8%26amp%3B6%2C3%5C%5C9%2C8%26amp%3B7%2C3%26amp%3B4%2C8%26amp%3B4%2C8%5C%5C5%2C9%26amp%3B3%2C7%26amp%3B5%26amp%3B4%2C9%5Cend%7Barray%7D%5Cright%5D "A = \left[\begin{array}{cccc}X&3,1&7,9&4,9\\5,2&4,5&5,8&6,3\\9,8&7,3&4,8&4,8\\5,9&3,7&5&4,9\end{array}\right]")
e ![E_{1} = \left[\begin{array}{cccc}1&0&0&0\\0&0&0&0\\0&0&0&0\\0&0&0&0\end{array}\right]](https://tex.z-dn.net/?f=E_%7B1%7D+%3D+%5Cleft%5B%5Cbegin%7Barray%7D%7Bcccc%7D1%26amp%3B0%26amp%3B0%26amp%3B0%5C%5C0%26amp%3B0%26amp%3B0%26amp%3B0%5C%5C0%26amp%3B0%26amp%3B0%26amp%3B0%5C%5C0%26amp%3B0%26amp%3B0%26amp%3B0%5Cend%7Barray%7D%5Cright%5D "E_{1} = \left[\begin{array}{cccc}1&0&0&0\\0&0&0&0\\0&0&0&0\\0&0&0&0\end{array}\right]")
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Qual o valor de X torna a equação 
verdadeira ?
Soluções para a tarefa
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Resposta:
Explicação passo-a-passo:
Sei naum ;-;
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