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	<title>Professores Online &#187; ingris</title>
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		<title>Calcule o valor de x, a fim de que</title>
		<link>https://www.professoronline.net/calcule-o-valor-de-x-a-fim-de-que/</link>
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		<pubDate>Sat, 02 Nov 2013 21:07:35 +0000</pubDate>
		<dc:creator><![CDATA[ingris]]></dc:creator>
				<category><![CDATA[Matemática]]></category>
		<category><![CDATA[a]]></category>
		<category><![CDATA[calcule]]></category>
		<category><![CDATA[de]]></category>
		<category><![CDATA[fim]]></category>
		<category><![CDATA[o]]></category>
		<category><![CDATA[que]]></category>
		<category><![CDATA[valor]]></category>
		<category><![CDATA[x]]></category>

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		<description><![CDATA[Calcule o valor de x, a fim de que o determinante da matriz A seja nulo. http://www.brasilescola.com/upload/conteudo/images/det1.jpg 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]]></description>
				<content:encoded><![CDATA[<p>Calcule o valor de x, a fim de que o determinante da matriz A seja nulo.</p>
<p>http://www.brasilescola.com/upload/conteudo/images/det1.jpg</p>
<p>Não consigo entender como chegar a resposta final que é: http://www.brasilescola.com/upload/conteudo/images/resolu%C3%A7%C3%A3o1_1.jpg<br />
procurei em todos os sites, e só encontro a resposta assim, e fico sem saber de onde surgiu o (x-7)6=0</p>
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