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Calcule o valor de x, a fim de que
Calcule o valor de x, a fim de que o determinante da matriz A seja nulo.
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Não consigo entender como chegar a resposta final que é: http://www.brasilescola.com/upload/conteudo/images/resolu%C3%A7%C3%A3o1_1.jpg
procurei em todos os sites, e só encontro a resposta assim, e fico sem saber de onde surgiu o (x-7)6=0
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Ainda nao ha resposta para essa pergunta, enquanto isso pode-se tornar um usuario premium para atendimento especializado. Saiba mais em escritorios de advocacia online.Answer this Question
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