{"id":11802,"date":"2019-09-23T13:33:17","date_gmt":"2019-09-23T16:33:17","guid":{"rendered":"https:\/\/beduka.com\/blog\/?p=11802"},"modified":"2019-10-01T14:16:35","modified_gmt":"2019-10-01T17:16:35","slug":"exercicios-de-determinantes","status":"publish","type":"post","link":"https:\/\/beduka.com\/blog\/exercicios\/matematica-exercicios\/exercicios-de-determinantes\/","title":{"rendered":"Exerc\u00edcios de Determinantes"},"content":{"rendered":"\n<blockquote class=\"wp-block-quote\"><p><strong><em>O determinante \u00e9 o n\u00famero ligado a uma matriz quadrada. Leia todo o resumo sobre essa mat\u00e9ria e teste seus conhecimentos com os exerc\u00edcios de determinantes.<\/em><\/strong><br><\/p><\/blockquote>\n\n\n\n<p>O determinante \u00e9 uma das mat\u00e9rias que mais causam d\u00favidas nos estudantes, por isso resolvemos esclarecer algumas quest\u00f5es nesse artigo. Na prova do <a href=\"https:\/\/beduka.com\/blog\/enem\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (abre numa nova aba)\">ENEM<\/a>, no caderno de Matem\u00e1tica e suas Tecnologias podem ser cobrados alguns exerc\u00edcios sobre determinantes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Resumo &#8211; Determinantes<\/h2>\n\n\n\n<p>Na <a href=\"https:\/\/beduka.com\/blog\/exercicios\/matematica-exercicios\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (abre numa nova aba)\">matem\u00e1tica<\/a>, o determinante permite transformar a matriz em um n\u00famero real.<br><\/p>\n\n\n\n<p>Os c\u00e1lculos realizados entre os elementos de uma matriz quadrada est\u00e3o relacionados ao n\u00famero chamado determinante da matriz.&nbsp;<br><\/p>\n\n\n\n<p>O <strong><em>det A<\/em><\/strong><em> <\/em>\u00e9 o determinante da matriz <em>A <\/em>e os par\u00eanteses, colchetes e at\u00e9 mesmo as barras duplas s\u00e3o substitu\u00eddas por barras simples. Para entender melhor vamos analisar o seguinte exemplo:<br><\/p>\n\n\n\n<p><strong>Matriz A =<\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" loading=\"lazy\" width=\"600\" height=\"300\" src=\"https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/Matriz-a-Exerc\u00edcios-de-Determinantes.jpg\" alt=\"Matriz a - Exerc\u00edcios de Determinantes\" class=\"wp-image-11811\" srcset=\"https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/Matriz-a-Exerc\u00edcios-de-Determinantes.jpg 600w, https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/Matriz-a-Exerc\u00edcios-de-Determinantes-300x150.jpg 300w, https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/Matriz-a-Exerc\u00edcios-de-Determinantes-320x160.jpg 320w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure><\/div>\n\n\n\n<p><strong>Essa matriz pode ser ser representada por colchetes ou barras duplicadas, sendo ent\u00e3o <\/strong><strong><em>det A <\/em><\/strong><strong>=<\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" loading=\"lazy\" width=\"600\" height=\"300\" src=\"https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/det-a-Exerc\u00edcios-de-Determinantes.jpg\" alt=\"det a - Exerc\u00edcios de Determinantes\" class=\"wp-image-11812\" srcset=\"https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/det-a-Exerc\u00edcios-de-Determinantes.jpg 600w, https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/det-a-Exerc\u00edcios-de-Determinantes-300x150.jpg 300w, https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/det-a-Exerc\u00edcios-de-Determinantes-320x160.jpg 320w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure><\/div>\n\n\n\n<p>Nas matrizes quadradas, onde possui ordem 3&#215;3 os c\u00e1lculos podem ser feitos repetindo a 1\u00aa e a 2\u00aa coluna e multiplicar os elementos do determinantes, assim realizar a regra de Sarrus.&nbsp;<br><\/p>\n\n\n\n<p>Lembrando que uma matriz \u00e9 quadrada quando o n\u00famero de linhas \u00e9 igual ao n\u00famero de colunas.<br><\/p>\n\n\n\n<p><strong>Veja o exemplo de um determinante de ordem 3&#215;3:<\/strong><br><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" loading=\"lazy\" width=\"600\" height=\"300\" src=\"https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/determinante-regra-de-sarrus.jpg\" alt=\"determinante - regra de sarrus\" class=\"wp-image-11813\" srcset=\"https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/determinante-regra-de-sarrus.jpg 600w, https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/determinante-regra-de-sarrus-300x150.jpg 300w, https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/determinante-regra-de-sarrus-320x160.jpg 320w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure><\/div>\n\n\n\n<p><strong>Aplicando a Regra de Sarrus temos:<\/strong><br><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" loading=\"lazy\" width=\"600\" height=\"300\" src=\"https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/exemplo-da-aplica\u00e7\u00e3o-regra-de-sarrus.jpg\" alt=\"exemplo da aplica\u00e7\u00e3o regra de sarrus\" class=\"wp-image-11814\" srcset=\"https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/exemplo-da-aplica\u00e7\u00e3o-regra-de-sarrus.jpg 600w, https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/exemplo-da-aplica\u00e7\u00e3o-regra-de-sarrus-300x150.jpg 300w, https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/exemplo-da-aplica\u00e7\u00e3o-regra-de-sarrus-320x160.jpg 320w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure><\/div>\n\n\n\n<p><strong>Multiplicando os n\u00fameros de acordo com a seta temos:<\/strong><br><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" loading=\"lazy\" width=\"600\" height=\"300\" src=\"https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/multiplica\u00e7\u00e3o-da-regra-de-sarrus.jpg\" alt=\"multiplica\u00e7\u00e3o da regra de sarrus\" class=\"wp-image-11815\" srcset=\"https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/multiplica\u00e7\u00e3o-da-regra-de-sarrus.jpg 600w, https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/multiplica\u00e7\u00e3o-da-regra-de-sarrus-300x150.jpg 300w, https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/multiplica\u00e7\u00e3o-da-regra-de-sarrus-320x160.jpg 320w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure><\/div>\n\n\n\n<p>Depois de calculado \u00e9 necess\u00e1rio <strong>inverter os sinais das diagonais secund\u00e1rias<\/strong>, ent\u00e3o ser\u00e1<strong> +5, 0, 0, &#8211; 2, -6, 0.<\/strong><\/p>\n\n\n\n<p>J\u00e1 em uma matriz de ordem 2&#215;2, cada diagonal \u00e9 multiplicado e assim se realiza a subtra\u00e7\u00e3o do produto da diagonal principal do produto da diagonal secund\u00e1ria.<br><\/p>\n\n\n\n<p>Fa\u00e7a os exerc\u00edcios de determinantes para testar seus conhecimentos sobre o assunto.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Exerc\u00edcios de Determinantes<\/h2>\n\n\n\n<p>Baixe o melhor <a href=\"https:\/\/beduka.com\/blog\/enem\/plano-de-estudos-gratuito\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (abre numa nova aba)\">plano de estudos gratuito<\/a> que voc\u00ea encontrar\u00e1 na internet.<br><\/p>\n\n\n\n<p><strong>1 &#8211; <a href=\"https:\/\/www.vunesp.com.br\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"(Vunesp) (abre numa nova aba)\">(Vunesp)<\/a> &#8211; <\/strong>\u00a0Dadas as matrizes A =\u00a0<br><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" loading=\"lazy\" width=\"60\" height=\"57\" src=\"https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/exerc\u00edcios-de-determinantes.jpg\" alt=\"exerc\u00edcios de determinantes\" class=\"wp-image-11816\"\/><\/figure><\/div>\n\n\n\n<p>e B =<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/n5tmnN4E_yvn-TrNdyIBxEksCtV2ZUIU1ELEOO-FtlEGx1VwnejNZIxQO3WBM0TPZE55KHTydP5zjgZMzrZX-3gsqdxmQawaj2_lS28FlSzisEDs0WgArbIC3oVIGpTifsjPWhRN\" alt=\"\"\/><\/figure><\/div>\n\n\n\n<p>o determinante da matriz A.B \u00e9:<br><\/p>\n\n\n\n<p>a) \u2013 1<\/p>\n\n\n\n<p>b) 6<\/p>\n\n\n\n<p>c) 10<\/p>\n\n\n\n<p>d) 12<\/p>\n\n\n\n<p>e) 14<br><\/p>\n\n\n\n<p><strong>2 &#8211;\u00a0 (UESP) &#8211; <\/strong>Se o determinante da matriz<br><\/p>\n\n\n\n<p>p&nbsp; 2  2<\/p>\n\n\n\n<p>p&nbsp; 4  4<\/p>\n\n\n\n<p>p&nbsp; 4  1<br><\/p>\n\n\n\n<p>\u00e9 igual a -18, ent\u00e3o o determinante da matriz<\/p>\n\n\n\n<p>p&nbsp; -1  2<\/p>\n\n\n\n<p>p&nbsp; -2  4<\/p>\n\n\n\n<p>p&nbsp; -2  1<br><\/p>\n\n\n\n<p>\u00e9 igual a:<br><\/p>\n\n\n\n<p>a) -9<\/p>\n\n\n\n<p>b) -6<\/p>\n\n\n\n<p>c) 3<\/p>\n\n\n\n<p>d) 6<\/p>\n\n\n\n<p>e) 9<br><\/p>\n\n\n\n<p><strong>3 &#8211; (UESP) &#8211; <\/strong>Se o determinante da matriz:<br><\/p>\n\n\n\n<p>2&nbsp; 1   0<\/p>\n\n\n\n<p>k&nbsp; k   k<\/p>\n\n\n\n<p>1&nbsp; 2  -2<br><\/p>\n\n\n\n<p>\u00e9 igual a 10, ent\u00e3o o determinante da matriz:<br><\/p>\n\n\n\n<p>2 &nbsp; &nbsp; &nbsp; 1       0<\/p>\n\n\n\n<p>k+4 &nbsp; k+3   k-1<\/p>\n\n\n\n<p>1&nbsp; &nbsp; \t2&nbsp; \t-2<br><\/p>\n\n\n\n<p>\u00e9 igual a:<br><\/p>\n\n\n\n<p>a) 7<\/p>\n\n\n\n<p>b) 8<\/p>\n\n\n\n<p>c) 9<\/p>\n\n\n\n<p>d) 10<\/p>\n\n\n\n<p>e) 11<br><\/p>\n\n\n\n<p><strong>4 &#8211; <a href=\"http:\/\/www.funcab.org\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"(Funcab) (abre numa nova aba)\">(Funcab)<\/a> &#8211; <\/strong>Sabendo que A \u00e9 uma matriz quadrada de ordem 3 e que o determinante de A \u00e9 -2, calcule o valor do determinante da matriz 3A.<br><\/p>\n\n\n\n<p>a) \u2013 8<\/p>\n\n\n\n<p>b) \u2013 54<\/p>\n\n\n\n<p>c) 27<\/p>\n\n\n\n<p>d) 18<\/p>\n\n\n\n<p>e) \u2013 2<br><\/p>\n\n\n\n<p><strong>5 &#8211; <a href=\"http:\/\/www.funcab.org\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"(Funcab)  (abre numa nova aba)\">(Funcab) <\/a>&#8211; <\/strong>Considerando a matriz quadrada A abaixo, e det(A) seu determinante, calcule o valor de 5.det(A).<br><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" loading=\"lazy\" width=\"135\" height=\"59\" src=\"https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/quest\u00f5es-sobre-determinantes.jpg\" alt=\"quest\u00f5es sobre determinantes\" class=\"wp-image-11817\"\/><\/figure><\/div>\n\n\n\n<p>a) 10<\/p>\n\n\n\n<p>b) -140<\/p>\n\n\n\n<p>c) 270<\/p>\n\n\n\n<p>d) 130<\/p>\n\n\n\n<p>e) -35<br><\/p>\n\n\n\n<p><strong>6 &#8211;<a href=\"http:\/\/www.cops.uel.br\/v2\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (PM PR 2010 \u2013 Cops) (abre numa nova aba)\"> (PM PR 2010 \u2013 Cops)<\/a> &#8211; <\/strong>Considere uma colis\u00e3o de dois ve\u00edculos. Num sistema de coordenadas cartesianas, as posi\u00e7\u00f5es finais destes ve\u00edculos ap\u00f3s a colis\u00e3o s\u00e3o dadas nos pontos A = (2,2) e B = (4, 1). Para compreender como ocorreu a colis\u00e3o \u00e9 importante determinar a trajet\u00f3ria retil\u00ednea que passa pelos pontos A e B.<br><\/p>\n\n\n\n<p>Essa trajet\u00f3ria \u00e9 dada pela equa\u00e7\u00e3o:<br><\/p>\n\n\n\n<p>a) x \u2013 y = 0<\/p>\n\n\n\n<p>b) x + y \u2013 5 = 0<\/p>\n\n\n\n<p>c) x \u2013 2y + 2 = 0<\/p>\n\n\n\n<p>d) 2x + 2y \u2013 8 = 0<\/p>\n\n\n\n<p>e) x + 2y \u2013 6 = 0<br><\/p>\n\n\n\n<p><strong>7 &#8211;<a href=\"http:\/\/www.esaf.fazenda.gov.br\/@@consultar_eventos?b_start:int=50\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (RFB 2009 \u2013 Esaf) (abre numa nova aba)\"> (RFB 2009 \u2013 Esaf)<\/a> &#8211; <\/strong>Com rela\u00e7\u00e3o ao sistema<br><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" loading=\"lazy\" width=\"159\" height=\"77\" src=\"https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/exercicios-resolvidos-determinantes.png\" alt=\"\" class=\"wp-image-11818\"\/><\/figure><\/div>\n\n\n\n<p>onde<br><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" loading=\"lazy\" width=\"84\" height=\"40\" src=\"https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/determinantes.gif\" alt=\"determinantes\" class=\"wp-image-11819\"\/><\/figure><\/div>\n\n\n\n<p>pode-se, com certeza, afirmar que:<br><\/p>\n\n\n\n<p>a) \u00e9 imposs\u00edvel<\/p>\n\n\n\n<p>b) \u00e9 indeterminado<\/p>\n\n\n\n<p>c) possui determinante igual a 4<\/p>\n\n\n\n<p>d) possui apenas a solu\u00e7\u00e3o trivial<\/p>\n\n\n\n<p>e) \u00e9 homog\u00eaneo<br><\/p>\n\n\n\n<p><strong>8 &#8211; <a href=\"https:\/\/www.anac.gov.br\/acesso-a-informacao\/concurso-publico\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"(ANAC \u2013 ESAF 2016) (abre numa nova aba)\">(ANAC \u2013 ESAF 2016)<\/a> &#8211; <\/strong>Dada a matriz A abaixo, o determinante da matriz 2A \u00e9 igual a:<br><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" loading=\"lazy\" width=\"130\" height=\"79\" src=\"https:\/\/beduka.com\/blog\/wp-content\/uploads\/2019\/09\/determinantes-exerc\u00edcios.gif\" alt=\"determinantes exerc\u00edcios\" class=\"wp-image-11820\"\/><\/figure><\/div>\n\n\n\n<p>a) 40.<\/p>\n\n\n\n<p>b) 10.<\/p>\n\n\n\n<p>c) 18.<\/p>\n\n\n\n<p>d) 16.<\/p>\n\n\n\n<p>e) 36.<br><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Respostas dos Exerc\u00edcios de Determinantes<\/h2>\n\n\n\n<p><strong>Exerc\u00edcio resolvido da quest\u00e3o 1 &#8211;<\/strong><\/p>\n\n\n\n<p>e) 14<br><\/p>\n\n\n\n<p><strong>Exerc\u00edcio resolvido da quest\u00e3o 2 &#8211;<\/strong><\/p>\n\n\n\n<p>e) 9<br><\/p>\n\n\n\n<p><strong>Exerc\u00edcio resolvido da quest\u00e3o 3 &#8211;<\/strong><\/p>\n\n\n\n<p>b) 8<br><\/p>\n\n\n\n<p><strong>Exerc\u00edcio resolvido da quest\u00e3o 4 &#8211;<\/strong><\/p>\n\n\n\n<p>b) \u2013 54<br><\/p>\n\n\n\n<p><strong>Exerc\u00edcio resolvido da quest\u00e3o 5 &#8211;<\/strong><\/p>\n\n\n\n<p>c) 270<br><\/p>\n\n\n\n<p><strong>Exerc\u00edcio resolvido da quest\u00e3o 6 &#8211;<\/strong><\/p>\n\n\n\n<p>e) x + 2y \u2013 6 = 0<br><\/p>\n\n\n\n<p><strong>Exerc\u00edcio resolvido da quest\u00e3o 7 &#8211;<\/strong><\/p>\n\n\n\n<p>c) possui determinante igual a 4<br><\/p>\n\n\n\n<p><strong>Exerc\u00edcio resolvido da quest\u00e3o 8 &#8211;<\/strong><\/p>\n\n\n\n<p>a) 40.<br><\/p>\n\n\n\n<p>Estude para o Enem com o<a href=\"https:\/\/beduka.com\/simulado\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (abre numa nova aba)\"> Simulado Beduka.<\/a> <strong>\u00c9 gratuito!<\/strong><br><\/p>\n\n\n\n<p>Gostou dos nossos&nbsp; exerc\u00edcios de determinantes? Compartilhe com os seus amigos e comente abaixo sobre \u00e1reas que voc\u00ea deseja mais explica\u00e7\u00f5es.<br><\/p>\n\n\n\n<p>Queremos te ajudar a encontrar a <strong>FACULDADE IDEAL! <\/strong>Logo abaixo, fa\u00e7a uma pesquisa por curso e cidade que te mostraremos todas as faculdades que podem te atender. <strong>Informamos a nota de corte, valor de mensalidade, nota do MEC, avalia\u00e7\u00e3o dos alunos, modalidades de ensino e muito mais.<\/strong><br><\/p>\n\n\n\n<p>Experimente agora!<br><\/p>\n","protected":false},"excerpt":{"rendered":"<p>O determinante \u00e9 o n\u00famero ligado a uma matriz quadrada. Leia todo o resumo sobre essa mat\u00e9ria e teste seus conhecimentos com os exerc\u00edcios de determinantes. O determinante \u00e9 uma das mat\u00e9rias que mais causam d\u00favidas nos estudantes, por isso resolvemos esclarecer algumas quest\u00f5es nesse artigo. Na prova do ENEM, no caderno de Matem\u00e1tica e [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":11809,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"categories":[610],"tags":[1446],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.10 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>RESUMO + EXERC\u00cdCIOS sobre DETERMINANTES com GABARITO - matriz<\/title>\n<meta name=\"description\" content=\"Entenda o que \u00e9 determinante com o nosso resumo completo da mat\u00e9ria! 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