{"id":125629,"date":"2019-04-02T00:19:32","date_gmt":"2019-04-02T03:19:32","guid":{"rendered":"http:\/\/clubes.obmep.org.br\/blog\/?page_id=125629"},"modified":"2020-07-17T16:56:59","modified_gmt":"2020-07-17T19:56:59","slug":"probleminha-soma-dos-algarismos","status":"publish","type":"page","link":"https:\/\/clubes.obmep.org.br\/blog\/probleminha-soma-dos-algarismos\/","title":{"rendered":".Probleminha: Soma dos algarismos"},"content":{"rendered":"<p style=\"margin:30px\">\n<div class=\"g1n\" style=\"line-height:23px;\">\n<p class=\"tit\" style=\"line-height:20px; margin-bottom: 10px;\">Problema<br \/>\n<span style=\"font-size:12px;color:#800000\"> (Indicado a partir do 9\u00ba ano do E. F.)<\/span><\/p>\n<hr style=\"height:1px; width:100%;background-color:#800000; margin-top: 10px; margin-bottom: 20px;border: 0 none\"\/>\n<p>Qual a soma dos algarismos do n\u00famero que se obt\u00e9m elevando ao quadrado\t[tex]\\boxed{\\,5\\underbrace{00\\dots0}_{2019 \\, zeros}1\\,} \\, [\/tex]?<\/p>\n<p style=\" text-align:right; font-size:12px;margin-top:20px;\">(Problema adaptado das <strong> Olimp\u00edadas Portuguesas de Matem\u00e1tica<\/strong>)<\/p>\n<\/div>\n<p style=\"margin:30px\">\n<div class=\"g1n\" style=\"line-height:33px;\">\n<p class=\"tit\"style=\"line-height:30px; margin-bottom: 10px;\">Solu\u00e7\u00e3o<\/p>\n<hr style=\"height:1px; width:100%;background-color:#800000; margin-top: 10px; margin-bottom: 20px;border: 0 none\"\/>\n<p>Seja [tex] N = 5\\underbrace{00\\dots0}_{2019 \\, zeros}1[\/tex] e observe que esse n\u00famero pode ser representado por [tex] \\boxed{\\,N = 5 \\cdot 10^{2020} + 1\\,} \\, .[\/tex] <\/p>\n<p style=\"padding-right:250px;\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/clubes.obmep.org.br\/blog\/wp-content\/uploads\/2019\/04\/zeros.png\" style=\"border:none\" alt=\"\" width=\"220\" height=\"240\" class=\"alignright size-full wp-image-125628\" srcset=\"https:\/\/clubes.obmep.org.br\/blog\/wp-content\/uploads\/2019\/04\/zeros.png 437w, https:\/\/clubes.obmep.org.br\/blog\/wp-content\/uploads\/2019\/04\/zeros-276x300.png 276w\" sizes=\"auto, (max-width: 220px) 100vw, 220px\" \/><\/p>\n<p>Portanto, segue que:<br \/>\n[tex]\\qquad N^2=(5\\cdot10^{2020} + 1)^2\\\\<br \/>\n\\qquad N^2=25\\cdot10^{4040} + 10\\cdot10^{2020} + 1\\\\<br \/>\n\\qquad N^2=25\\cdot10^{4040} + 10^{2021} + 1\\\\<br \/>\n\\qquad N^2=25\\underbrace{00\\dots0}_{4040 \\, zeros} + 1\\underbrace{00\\dots0}_{2021 \\, zeros} + 1[\/tex]<br \/>\nou ainda,<br \/>\n[tex] \\qquad \\boxed{\\,N^2 = 25\\underbrace{00\\dots0}_{2018 \\, zeros}1\\underbrace{00\\dots0}_{2020 \\, zeros}1 \\,}[\/tex], cuja soma dos algarismos \u00e9 [tex] 9 [\/tex].<\/p>\n<hr style=\"height:1px; width:100%;background-color:#800000; margin-top: 10px; margin-bottom: 10px;border: 0 none\"\/>\n<p class=\"g2\">Solu\u00e7\u00e3o elaborada pelos <strong>Moderadores do Blog<\/strong>.<\/p>\n<\/div>\n<p style=\"margin:30px\">\n<div class=\"g3\">\nParticipou da discuss\u00e3o o Clube <strong>Simpatizantes da Matem\u00e1tica I<\/strong>.<\/div>\n<p style=\"margin:10px\">\n","protected":false},"excerpt":{"rendered":"<p>Problema (Indicado a partir do 9\u00ba ano do E. F.) Qual a soma dos algarismos do n\u00famero que se obt\u00e9m elevando ao quadrado [tex]\\boxed{\\,5\\underbrace{00\\dots0}_{2019 \\, zeros}1\\,} \\, [\/tex]? (Problema adaptado das Olimp\u00edadas Portuguesas de Matem\u00e1tica) Solu\u00e7\u00e3o Seja [tex] N = 5\\underbrace{00\\dots0}_{2019 \\, zeros}1[\/tex] e observe que esse n\u00famero pode ser representado por [tex] \\boxed{\\,N = &hellip; <\/p>\n<p><a class=\"more-link btn\" href=\"https:\/\/clubes.obmep.org.br\/blog\/probleminha-soma-dos-algarismos\/\">Continue lendo<\/a><\/p>\n","protected":false},"author":734,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"template-onecolumn.php","meta":{"footnotes":""},"class_list":["post-125629","page","type-page","status-publish","hentry","nodate","item-wrap"],"_links":{"self":[{"href":"https:\/\/clubes.obmep.org.br\/blog\/wp-json\/wp\/v2\/pages\/125629","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\/734"}],"replies":[{"embeddable":true,"href":"https:\/\/clubes.obmep.org.br\/blog\/wp-json\/wp\/v2\/comments?post=125629"}],"version-history":[{"count":7,"href":"https:\/\/clubes.obmep.org.br\/blog\/wp-json\/wp\/v2\/pages\/125629\/revisions"}],"predecessor-version":[{"id":158712,"href":"https:\/\/clubes.obmep.org.br\/blog\/wp-json\/wp\/v2\/pages\/125629\/revisions\/158712"}],"wp:attachment":[{"href":"https:\/\/clubes.obmep.org.br\/blog\/wp-json\/wp\/v2\/media?parent=125629"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}