{"id":165058,"date":"2020-09-18T19:01:03","date_gmt":"2020-09-18T22:01:03","guid":{"rendered":"http:\/\/clubes.obmep.org.br\/blog\/?page_id=165058"},"modified":"2024-06-25T21:05:01","modified_gmt":"2024-06-26T00:05:01","slug":"problema-para-ajudar-na-escola-uma-estranha-operacao","status":"publish","type":"page","link":"https:\/\/clubes.obmep.org.br\/blog\/problema-para-ajudar-na-escola-uma-estranha-operacao\/","title":{"rendered":".Problema para ajudar na escola: Uma estranha opera\u00e7\u00e3o"},"content":{"rendered":"<p class=\"g2\" ><strong><a href=\"http:\/\/clubes.obmep.org.br\/blog\/?p=220915\" rel=\"noopener\" target=\"_blank\">&#9999; <span style=\"color:#A0522D;font-size:14px;\">Link do problema para dispositivos da <em>Apple<\/em>.<\/span><\/a><\/strong><\/p>\n<div class=\"g1n\" style=\"line-height:25px;padding-bottom:15px; margin-bottom:40px;\">\n<p class=\"tit\" style=\"line-height:20px;margin:10px\">Problema<br \/>\n<span style=\"font-size:12px;color:#00BF00;\"> (A partir do 9\u00ba ano do E. F.- <span style=\"font-weight: normal;\"> N\u00edvel de dificuldade: F\u00e1cil<\/span>)<\/span><\/p>\n<hr style=\"height:1px; width:100%;background-color:#800000; margin-top: 10px; margin-bottom: 20px;border: 0 none\"\/>\nSe para os n\u00fameros [tex]x[\/tex], [tex]y[\/tex] e [tex]z[\/tex] definimos<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/clubes.obmep.org.br\/blog\/wp-content\/uploads\/2020\/09\/prob471_12.png\" style=\"border: none;\"  alt=\"\" width=\"465\" height=\"68\" class=\"aligncenter size-full wp-image-165832\" srcset=\"https:\/\/clubes.obmep.org.br\/blog\/wp-content\/uploads\/2020\/09\/prob471_12.png 465w, https:\/\/clubes.obmep.org.br\/blog\/wp-content\/uploads\/2020\/09\/prob471_12-300x44.png 300w\" sizes=\"auto, (max-width: 465px) 100vw, 465px\" \/><\/p>\n<p>calcule:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/clubes.obmep.org.br\/blog\/wp-content\/uploads\/2020\/09\/prob471_22.png\"  style=\"border: none;\" alt=\"\" width=\"381\" height=\"68\" class=\"aligncenter size-full wp-image-165831\" srcset=\"https:\/\/clubes.obmep.org.br\/blog\/wp-content\/uploads\/2020\/09\/prob471_22.png 381w, https:\/\/clubes.obmep.org.br\/blog\/wp-content\/uploads\/2020\/09\/prob471_22-300x54.png 300w\" sizes=\"auto, (max-width: 381px) 100vw, 381px\" \/><\/p>\n<p style=\"margin:10px\">\n<\/div>\n<div class=\"g1n\" style=\"line-height:32px;\">\n<p class=\"tit\" style=\"line-height:30px;margin:10px\">Solu\u00e7\u00e3o<\/p>\n<hr style=\"height:1px; width:100%;background-color:#800000; margin-top: 1px; margin-bottom: 20px;border: 0 none\"\/>\nPara aplicarmos a defini\u00e7\u00e3o da estranha opera\u00e7\u00e3o, precisamos determinar n\u00fameros [tex]x[\/tex], [tex]y[\/tex] e [tex]z[\/tex] tais que:<br \/>\n[tex]\\qquad \\qquad \\begin{cases}<br \/>\nx+y=16\\qquad\\qquad \\textcolor{#800000}{(i)}\\\\<br \/>\ny+z=21 \\qquad\\qquad \\textcolor{#800000}{(ii)}\\\\<br \/>\nz+x=13\\qquad\\qquad \\textcolor{#800000}{(iii)}<br \/>\n\\end{cases}[\/tex]<br \/>\nObserve que fazendo a diferen\u00e7a entre as equa\u00e7\u00f5es [tex]\\textcolor{#800000}{(i)}[\/tex] e [tex]\\textcolor{#800000}{(ii)}[\/tex] obtemos:<br \/>\n[tex]\\qquad \\qquad \\begin{array}{c l}<br \/>\nx+y=16&#038;-\\\\<br \/>\ny+z=21&#038;\\\\<br \/>\n\\hline<br \/>\nx-z=-5&#038;.<br \/>\n\\end{array}[\/tex]<br \/>\nSomando a equa\u00e7\u00e3o resultante com a equa\u00e7\u00e3o [tex]\\textcolor{#800000}{(iii)}[\/tex], temos que<br \/>\n[tex]\\qquad \\qquad \\begin{array}{c l}<br \/>\nx-z=-5&#038;+\\\\<br \/>\nz+x=13&#038;\\\\<br \/>\n\\hline<br \/>\n2x=8&#038;<br \/>\n\\end{array}[\/tex]<br \/>\ndonde conclu\u00edmos que [tex]\\boxed{x=4}[\/tex].<br \/>\nSubstituindo esse valor nas equa\u00e7\u00f5es [tex]\\textcolor{#800000}{(i)}[\/tex] e [tex]\\textcolor{#800000}{(iii)}[\/tex], obtemos que [tex]\\boxed{y=12}[\/tex] e [tex]\\boxed{z=9}[\/tex], respectivamente.<br \/>\nPronto, j\u00e1 podemos aplicar a defini\u00e7\u00e3o da opera\u00e7\u00e3o estranha:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/clubes.obmep.org.br\/blog\/wp-content\/uploads\/2020\/09\/prob479_1.png\" style=\"border: none;\"  alt=\"\" width=\"531\" height=\"162\" class=\"aligncenter size-full wp-image-165055\" srcset=\"https:\/\/clubes.obmep.org.br\/blog\/wp-content\/uploads\/2020\/09\/prob479_1.png 531w, https:\/\/clubes.obmep.org.br\/blog\/wp-content\/uploads\/2020\/09\/prob479_1-300x92.png 300w\" sizes=\"auto, (max-width: 531px) 100vw, 531px\" \/><\/p>\n<p>Portanto, o resultado final \u00e9 [tex]\\,\\fcolorbox{black}{#eee0e5}{$864$}\\,.[\/tex] <\/p>\n<hr style=\"height:1px; width:100%;background-color:#800000; margin-top: 10px; margin-bottom: 15px;border: 0 none\"\/>\n<p class=\"g2\" style=\"line-height:20px;\">Solu\u00e7\u00e3o elaborada pelos <strong>Moderadores do Blog<\/strong>.<\/p>\n<\/div>\n<p style=\"margin:20px\">\n<table style=\" height:auto; margin-left: auto; margin-right: auto;width:640px;\">\n<tr>\n<td class=\"bf\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1001 alignright\" style=\"border: 0px;\" alt=\"\" src=\"http:\/\/clubes.obmep.org.br\/blog\/wp-content\/uploads\/2013\/01\/menino.jpg\" width=\"80\" height=\"115\" \/><\/td>\n<td class=\"bf\">\n<p class=\"fala\" style=\"width:520px;background-color: #FFF5EE; padding:10px; font-family: calibri; font-size: 13px;color: #1C1C1C; line-height: 20px; \"> Se for conveniente, voc\u00ea pode obter um arquivo PDF desta p\u00e1gina, com o problema e a solu\u00e7\u00e3o, clicando no bot\u00e3o abaixo.<br \/>\nVoc\u00ea pode abrir o arquivo diretamente no seu navegador (<em>Chrome<\/em>, <em>Edge<\/em>, <em>Firefox<\/em>, <em>Safari<\/em>, entre outros), mas tamb\u00e9m pode utilizar o software gratuito <em><strong>Adobe Acrobat Reader<\/strong><\/em>.<br \/>\nCaso o dispositivo que voc\u00ea est\u00e1 utilizando n\u00e3o tenha o <strong><em>Acrobat Reader<\/em><\/strong> instalado, \u00e9 s\u00f3 clicar <a href=\"http:\/\/get.adobe.com\/br\/reader\/\" rel=\"noopener\" target=\"_blank\"><strong>AQUI<\/strong><\/a> para fazer o download adequado ao seu dispositivo.<\/p>\n<\/td>\n<\/tr>\n<\/table>\n<div style=\" float:right;  width: 100px;\">\n<p style=\"text-align: center; border-style: dotted; border-color :#FFFAFA; border-width :thin; width:90px;  height:40px;  padding: 5px; background-color: #800000;\">\n<a href=\"http:\/\/clubes.obmep.org.br\/blog\/wp-content\/uploads\/2020\/09\/Uma-estranha-opera\u00e7\u00e3o.pdf\" title=\" Arquivo PDF\" download=\"Clubes_ Uma estranha opera\u00e7\u00e3o.pdf\"><span style=\"color: #FFFAFA; font-family: georgia; font-size: 16px;\"><strong>Arquivo <\/strong><\/span><\/a>\n <\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>&#9999; Link do problema para dispositivos da Apple. Problema (A partir do 9\u00ba ano do E. F.- N\u00edvel de dificuldade: F\u00e1cil) Se para os n\u00fameros [tex]x[\/tex], [tex]y[\/tex] e [tex]z[\/tex] definimos calcule: Solu\u00e7\u00e3o Para aplicarmos a defini\u00e7\u00e3o da estranha opera\u00e7\u00e3o, precisamos determinar n\u00fameros [tex]x[\/tex], [tex]y[\/tex] e [tex]z[\/tex] tais que: [tex]\\qquad \\qquad \\begin{cases} x+y=16\\qquad\\qquad \\textcolor{#800000}{(i)}\\\\ y+z=21 \\qquad\\qquad &hellip; <\/p>\n<p><a class=\"more-link btn\" href=\"https:\/\/clubes.obmep.org.br\/blog\/problema-para-ajudar-na-escola-uma-estranha-operacao\/\">Continue lendo<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"template-onecolumn.php","meta":{"footnotes":""},"class_list":["post-165058","page","type-page","status-publish","hentry","nodate","item-wrap"],"_links":{"self":[{"href":"https:\/\/clubes.obmep.org.br\/blog\/wp-json\/wp\/v2\/pages\/165058","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/clubes.obmep.org.br\/blog\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/clubes.obmep.org.br\/blog\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/clubes.obmep.org.br\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/clubes.obmep.org.br\/blog\/wp-json\/wp\/v2\/comments?post=165058"}],"version-history":[{"count":8,"href":"https:\/\/clubes.obmep.org.br\/blog\/wp-json\/wp\/v2\/pages\/165058\/revisions"}],"predecessor-version":[{"id":220917,"href":"https:\/\/clubes.obmep.org.br\/blog\/wp-json\/wp\/v2\/pages\/165058\/revisions\/220917"}],"wp:attachment":[{"href":"https:\/\/clubes.obmep.org.br\/blog\/wp-json\/wp\/v2\/media?parent=165058"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}