{"id":7307,"date":"2012-01-08T18:30:42","date_gmt":"2012-01-08T18:30:42","guid":{"rendered":"https:\/\/www.acasinhadamatematica.pt\/?p=7307"},"modified":"2022-01-15T23:09:35","modified_gmt":"2022-01-15T23:09:35","slug":"atencao","status":"publish","type":"post","link":"https:\/\/www.acasinhadamatematica.pt\/?p=7307","title":{"rendered":"Aten\u00e7\u00e3o!"},"content":{"rendered":"<p><ul id='GTTabs_ul_7307' class='GTTabs' style='display:none'>\n<li id='GTTabs_li_0_7307' class='GTTabs_curr'><a  id=\"7307_0\" onMouseOver=\"GTTabsShowLinks('Enunciado'); return true;\"  onMouseOut=\"GTTabsShowLinks();\"  class='GTTabsLinks'>Enunciado<\/a><\/li>\n<li id='GTTabs_li_1_7307' ><a  id=\"7307_1\" onMouseOver=\"GTTabsShowLinks('Resolu\u00e7\u00e3o'); return true;\"  onMouseOut=\"GTTabsShowLinks();\"  class='GTTabsLinks'>Resolu\u00e7\u00e3o<\/a><\/li>\n<\/ul>\n\n<div class='GTTabs_divs GTTabs_curr_div' id='GTTabs_0_7307'>\n<span class='GTTabs_titles'><b>Enunciado<\/b><\/span><\/p>\n<p style=\"text-align: left;\">Um aluno escreveu no seu caderno di\u00e1rio a nota :<\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/www.acasinhadamatematica.pt\/wp-content\/uploads\/2012\/01\/pg101-a.jpg\"><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"7308\" data-permalink=\"https:\/\/www.acasinhadamatematica.pt\/?attachment_id=7308\" data-orig-file=\"https:\/\/www.acasinhadamatematica.pt\/wp-content\/uploads\/2012\/01\/pg101-a.jpg\" data-orig-size=\"601,209\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;HP pstc4380&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"Nota\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/www.acasinhadamatematica.pt\/wp-content\/uploads\/2012\/01\/pg101-a.jpg\" class=\"aligncenter wp-image-7308\" title=\"Nota\" src=\"https:\/\/www.acasinhadamatematica.pt\/wp-content\/uploads\/2012\/01\/pg101-a.jpg\" alt=\"\" width=\"500\" height=\"174\" srcset=\"https:\/\/www.acasinhadamatematica.pt\/wp-content\/uploads\/2012\/01\/pg101-a.jpg 601w, https:\/\/www.acasinhadamatematica.pt\/wp-content\/uploads\/2012\/01\/pg101-a-300x104.jpg 300w, https:\/\/www.acasinhadamatematica.pt\/wp-content\/uploads\/2012\/01\/pg101-a-150x52.jpg 150w, https:\/\/www.acasinhadamatematica.pt\/wp-content\/uploads\/2012\/01\/pg101-a-400x139.jpg 400w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/p>\n<p>Este resultado \u00e9 curioso, n\u00e3o \u00e9? Onde est\u00e1 o erro?<\/p>\n<p><div class='GTTabsNavigation' style='display:none'><span class='GTTabs_nav_next'><a href='#GTTabs_ul_7307' onClick='GTTabs_show(1,7307)'>Resolu\u00e7\u00e3o &gt;&gt;<\/a><\/span><\/div><\/div>\n\n<div class='GTTabs_divs' id='GTTabs_1_7307'>\n<span class='GTTabs_titles'><b>Resolu\u00e7\u00e3o<\/b><\/span><!--more--><\/p>\n<p>Considerando a monotonia parcial da multiplica\u00e7\u00e3o, ao multiplicar $-5&lt;-4$ por $h$ h\u00e1 duas situa\u00e7\u00f5es:<\/p>\n<ol>\n<li>Se $h&gt;0$, ent\u00e3o: $$-5h&lt;-4h$$<\/li>\n<li>Se $h&lt;0$, ent\u00e3o: $$-5h&gt;-4h$$<\/li>\n<\/ol>\n<p>Assim, ao substituir $h$ por $-2$ deve ter-se em considera\u00e7\u00e3o a situa\u00e7\u00e3o 2: $$\\begin{array}{*{35}{l}} \u00a0\u00a0 -5\\times (-2)&gt;-4\\times (-2) &amp; \\Leftrightarrow\u00a0 &amp; 10&gt;8\u00a0 \\\\ \\end{array}$$<\/p>\n<div class='GTTabsNavigation' style='display:none'><span class='GTTabs_nav_prev'><a href='#GTTabs_ul_7307' onClick='GTTabs_show(0,7307)'>&lt;&lt; Enunciado<\/a><\/span><\/div><\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>Enunciado Resolu\u00e7\u00e3o Enunciado Um aluno escreveu no seu caderno di\u00e1rio a nota : Este resultado \u00e9 curioso, n\u00e3o \u00e9? Onde est\u00e1 o erro? Resolu\u00e7\u00e3o &gt;&gt; Resolu\u00e7\u00e3o &lt;&lt; Enunciado<\/p>\n","protected":false},"author":1,"featured_media":20305,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[213,97,258],"tags":[426,270,266],"series":[],"class_list":["post-7307","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-9--ano","category-aplicando","category-os-numeros-reais","tag-9-o-ano","tag-inequacao","tag-numeros-reais"],"views":2608,"jetpack_featured_media_url":"https:\/\/www.acasinhadamatematica.pt\/wp-content\/uploads\/2012\/01\/9V1Pag101-9_520x245.png","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"_links":{"self":[{"href":"https:\/\/www.acasinhadamatematica.pt\/index.php?rest_route=\/wp\/v2\/posts\/7307","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.acasinhadamatematica.pt\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.acasinhadamatematica.pt\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.acasinhadamatematica.pt\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.acasinhadamatematica.pt\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7307"}],"version-history":[{"count":0,"href":"https:\/\/www.acasinhadamatematica.pt\/index.php?rest_route=\/wp\/v2\/posts\/7307\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.acasinhadamatematica.pt\/index.php?rest_route=\/wp\/v2\/media\/20305"}],"wp:attachment":[{"href":"https:\/\/www.acasinhadamatematica.pt\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7307"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.acasinhadamatematica.pt\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7307"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.acasinhadamatematica.pt\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7307"},{"taxonomy":"series","embeddable":true,"href":"https:\/\/www.acasinhadamatematica.pt\/index.php?rest_route=%2Fwp%2Fv2%2Fseries&post=7307"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}