[{"_1":2,"_332":-5,"_333":-5},"loaderData",{"_3":4,"_9":10},"root",{"_5":-5,"_6":7,"_8":-5},"registerModalConfig","url","https://prouniversitario.com/exercicios/f68be1eb-90c0-417a-a471-9d63c1e876d5?video=true","user","pages/questions/show/index",{"_11":12,"_13":14,"_15":14,"_16":17,"_78":79,"_171":172,"_30":244,"_306":307,"_328":329,"_330":331},"comments",[],"hasVideoHash",false,"isAiGenerated","question",{"_18":19,"_20":21,"_22":23,"_24":25,"_57":58,"_72":21,"_73":74,"_75":76,"_77":45},"correctOptionId","3850b725-d5b0-4c3f-9c90-15ab1dbc3c41","difficulty","","id","f68be1eb-90c0-417a-a471-9d63c1e876d5","metadata",{"_26":27,"_53":54,"_55":56},"pd",{"_28":29,"_30":31,"_32":33,"_40":41,"_42":43,"_44":45,"_46":47,"_48":45,"_49":50,"_51":52},"area","Outros","tags",[],"subjects",[34],{"_22":35,"_36":37,"_38":39},1663620,"name","Resistência dos Materiais","alias","resistencia-dos-materiais","materialId","134045632","answerCount",1,"isIndexable",true,"mainSubject",{"_22":35,"_36":37,"_38":39},"isIndexableSEO","materialFormat","Text","studentDegreeLevel","Graduate","source","PD","externalId","134255380","options",[59,64,68],{"_22":19,"_60":61,"_62":63},"label","A","text","

Recozimento

",{"_22":65,"_60":66,"_62":67},"647cab6e-9481-45bd-91b7-4cac55f8e7df","B","

Normalização

",{"_22":69,"_60":70,"_62":71},"6c349a95-308b-4b4a-8804-7057e416efef","C","

Revenido

","solution_explanation","statement","

O tratamento térmico realizado com a finalidade de diminuir a dureza para facilitar a usinabilidade do aço e remover tensões devidas aos tratamentos mecânicos a frio ou a quente é denominado:

","status","pending_classification","hasRelatedVideo","relatedVideos",[80],{"_81":82,"_100":101,"_30":116,"_151":152,"_170":117},"content",{"_22":83,"_36":84,"_85":-5,"_86":87,"_88":89,"_90":-5,"_24":91,"_94":95,"_96":95,"_97":-5,"_98":99},"468e3e62-35e0-47be-a15f-68dd43bb32bb","Óptica Geométrica - Parte 1","description","content_type_id","1051eee7-c62e-4b2c-9900-77a29fcec080","resource_id","fa6aaf42-4cc4-4d76-8915-7a67081f7e9a","user_id",{"_92":93},"external_id","4963","created_at","2025-08-20T12:27:41.608438+00:00","updated_at","content_group_id","slug","optica-geometrica-parte-1","prometheusData",{"_102":103,"_109":110,"_111":112,"_113":114,"_6":115},"provider",{"_22":104,"_105":106,"_107":108},"06f120be-2194-4548-8336-7ba44ffbae14","key","grupo_q_proteus","kind","proteus","reference","d80487a0-0f98-42c8-99bb-551165ba3068","state","completed","thumbnail_url","https://proteus.grupoq.io/videos/d80487a0-0f98-42c8-99bb-551165ba3068/thumbnailsthumb.0000000.jpg","https://proteus.grupoq.io/videos/d80487a0-0f98-42c8-99bb-551165ba3068/levels.m3u8",[117],{"_22":118,"_36":119,"_38":120,"_121":122,"_123":-5,"_94":124,"_96":124,"_24":125,"_98":120,"_132":133},"9772e958-72c6-4499-ad47-877cf94d670d","Exatas","exatas","tag_group_id","c1ce2cf2-b217-4cc7-8182-81c56bd3522d","parent_id","2025-04-29T01:56:45.284172+00:00",{"_126":127,"_128":129,"_130":131},"childrenCount",18,"content_count",0,"question_count",135489,"children",[134],{"_22":135,"_36":136,"_38":137,"_121":122,"_123":118,"_94":138,"_96":138,"_24":139,"_98":142,"_132":143},"ca6fee0e-79c6-4f1c-b500-ee081a071949","Mecânica","mecanica","2025-04-29T02:19:12.828432+00:00",{"_126":140,"_128":129,"_130":141},10,19948,"mecanica-2",[144],{"_22":145,"_36":37,"_38":39,"_121":122,"_123":135,"_94":146,"_96":146,"_24":147,"_98":149,"_132":150},"ac55bdba-154d-42e7-bc25-72dde822663d","2025-04-29T03:44:29.139762+00:00",{"_126":129,"_128":129,"_130":148},3376,"resistencia-dos-materiais-4",[],"video",{"_22":89,"_153":84,"_85":-5,"_154":155,"_156":157,"_6":-5,"_158":-5,"_102":157,"_159":160,"_113":-5,"_161":-5,"_162":-5,"_163":-5,"_164":-5,"_24":165,"_166":129,"_167":-5,"_75":168,"_94":169,"_96":169},"title","duration",20,"source_type","prometheus","iframe_url","provider_video_id","1cd3d633-d690-4f4b-9995-9b0e44994e35","format","quality","file_path","file_size",{"_92":93},"views_count","last_played_at","draft","2025-08-19T11:56:20.758718+00:00","tag","similarQuestions",[173,205,223],{"_18":174,"_20":21,"_22":175,"_57":176,"_72":193,"_73":194,"_30":195},"112831da-be9c-458e-94cb-e8292d0dba12","3c0b9441-b878-4896-8bac-fa4ca61e3f13",[177,180,183,186,190],{"_22":178,"_60":61,"_62":179},"265bd71a-6749-41f5-b291-67efd646ca64","y'' + 2y' - 3y = 0",{"_22":181,"_60":66,"_62":182},"6d3c3a1d-8e80-4ff3-b97a-d5b5bca91940","6y'' - y' - y = 0",{"_22":184,"_60":70,"_62":185},"4168ac67-64fd-46ed-a69c-a01dbfcde7ea","y'' - 2y' + y = 0",{"_22":187,"_60":188,"_62":189},"cc7bc8df-6995-4264-ac5a-32ea9b4ed7db","D","9y'' + 6y' + y = 0",{"_22":174,"_60":191,"_62":192},"E","y'' - 2y' + 6y = 0","Somente em y''−2y'+6y=0 o polinômio característico r²−2r+6=0 tem Δ<0, gerando raízes complexas conjugadas (1±i√5) e, portanto, solução em termos de exponencial modulando seno e cosseno. Nos demais itens (a–d) o discriminante é ≥0, produzindo raízes reais (distintas ou repetidas).","

Resolva as seguintes EDOs determinando a solução geral e, quando houver condições iniciais do PVI, a solução particular.

(a) y'' + 2y' - 3y = 0

(b) 6y'' - y' - y = 0

(d) 9y'' + 6y' + y = 0

(e) y'' - 2y' + 6y = 0

(f) 4y'' + 9y = 0

(g) 6y'' - 5y' + y = 0; \\, y(0) = 4; \\, y'(0) = 0

(h) y'' + 4y' + 4y = 0; \\, y(-1) = 2; \\, y'(-1) = 1

(i) y'' + y = 0; \\, y\bigg(\\frac{\\pi}{3}\\bigg) = 2; \\, y'\\bigg(\\frac{\\pi}{3}\\bigg) = -4

(j) y'' - 2y' - 3y = 3e^{2t}

(k) y'' + 9y = t^2 e^{3t} + 6

(l) 2y'' + 3y' + y = t^2 + 3 \\sin(t)

(m) y'' + y' - 2y = 2t; \\, y(0) = 0; \\, y'(0) = 1

(n) y'' - 2y' + y = te^t + 4; \\, y(0) = 1; \\, y'(0) = 1

(o) y'' + 4y = 3 \\sin(2t); \\, y(0) = 2; \\, y'(0) = -1

",[196],{"_22":197,"_36":198,"_38":199,"_121":122,"_123":200,"_94":201,"_96":201,"_24":202,"_98":199},"6516bbbd-f2a3-4710-8382-702240b17836","Mecânica na Engenharia de Petróleo","mecanica-na-engenharia-de-petroleo","b787e438-0ab3-454c-ab43-5d3d14c2720d","2025-04-29T03:44:35.328997+00:00",{"_126":203,"_128":129,"_130":204},4,12302,{"_18":206,"_20":21,"_22":207,"_57":208,"_72":220,"_73":221,"_30":222},"6831a9b9-c9a4-4a76-bd7a-2ce98bfea875","93a32dd4-5fc6-4ccb-a76f-4724bf113742",[209,212,215,217],{"_22":210,"_60":61,"_62":211},"13e3f476-a0a5-421f-b47e-0969e8e9a7e0","

Verdadeiro, verdadeiro, falso

",{"_22":213,"_60":66,"_62":214},"c9a20855-d84b-4860-8b35-9784818282cf","

Falso, verdadeiro, verdadeiro

",{"_22":206,"_60":70,"_62":216},"

Verdadeiro, falso, verdadeiro

",{"_22":218,"_60":188,"_62":219},"3c98539b-1af9-4d44-aecd-c266754a2075","

Falso, falso, falso

","85,5 % decomposto → 14,5 % restante.\nN/N0 = 0,145 ⇒ t = ln(1/0,145)/(ln2/5730) ≈ 1,6×10⁴ anos.\nItens prováveis: (1) resta 14,5 % do C-14 (V); (2) idade ≈ 1,2×10⁴ anos ou 3 meias-vidas (F); (3) t½ do C-14 = 5730 anos (V). Sequência: V-F-V, correspondendo à alternativa c.","

Qual é a idade da madeira na qual 85,5\\% do C-14 se decompos?

",[196],{"_18":224,"_20":21,"_22":225,"_57":226,"_72":241,"_73":242,"_30":243},"3ce109b1-6cdb-4b4d-8816-a6af4d74bed0","c478a46c-46a8-4942-ae14-2e79def3dda2",[227,230,233,235,238],{"_22":228,"_60":61,"_62":229},"a5a16a42-3e58-4c76-80f2-c291aa2d8e49","Sim",{"_22":231,"_60":66,"_62":232},"5e6d0254-696c-4da0-b572-82e3a19f433e","Não",{"_22":224,"_60":70,"_62":234},"Indeterminado",{"_22":236,"_60":188,"_62":237},"35403f68-a880-429d-97f4-db507c58de38","Todos",{"_22":239,"_60":191,"_62":240},"2e06d948-d37e-4350-afc7-ced04941bcaf","Nenhum","Os polinômios e números fornecidos estão corrompidos (símbolos “????”), impossibilitando aplicar Ruffini e concluir se são raízes. Sem dados completos, o problema é indeterminado.","Emplea la regla de Ruffini para dictaminar si los siguientes números son o no raíces de los polinomios citados:
a) ????3 de ????4????5
b) ????2 de ????2????????2
c) ????1 de 2????????1
d) ????1 de 2????2????",[196],[196,245,254,260,264,265,266,274,279,287,288,293,299],{"_22":246,"_36":247,"_38":248,"_121":122,"_123":249,"_94":138,"_96":138,"_24":250,"_98":253},"861ad829-750d-4a44-9569-2f18b430b4df","Engenharia Mecatrônica","engenharia-mecatronica","eb9315c5-bd04-4116-aa46-02c4fde320c0",{"_126":251,"_128":129,"_130":252},5,30614,"engenharia-mecatronica-1",{"_22":255,"_36":37,"_38":39,"_121":122,"_123":256,"_94":257,"_96":257,"_24":258,"_98":259},"8850e507-a691-4d45-a7c7-16221e9c5af2","88fe96b3-2a17-4198-90d5-ddda3d6f5d45","2025-04-29T04:00:13.215003+00:00",{"_126":129,"_128":129,"_130":148},"resistencia-dos-materiais-6",{"_22":256,"_36":136,"_38":137,"_121":122,"_123":246,"_94":201,"_96":201,"_24":261,"_98":263},{"_126":251,"_128":129,"_130":262},25741,"mecanica-3",{"_22":118,"_36":119,"_38":120,"_121":122,"_123":-5,"_94":124,"_96":124,"_24":125,"_98":120},{"_22":145,"_36":37,"_38":39,"_121":122,"_123":135,"_94":146,"_96":146,"_24":147,"_98":149},{"_22":267,"_36":268,"_38":269,"_121":122,"_123":249,"_94":138,"_96":138,"_24":270,"_98":273},"b6e37f32-f8e5-4025-bf0f-69ffc00fb331","Engenharia Civil","engenharia-civil",{"_126":271,"_128":129,"_130":272},21,45865,"engenharia-civil-3",{"_22":200,"_36":275,"_38":276,"_121":122,"_123":249,"_94":138,"_96":138,"_24":277,"_98":278},"Engenharia de Petróleo","engenharia-de-petroleo",{"_126":251,"_128":129,"_130":204},"engenharia-de-petroleo-1",{"_22":280,"_36":281,"_38":282,"_121":122,"_123":267,"_94":283,"_96":283,"_24":284,"_98":286},"c5bf57d4-c3d8-4365-b53e-085fa14a3a95","Estruturas","estruturas","2025-04-29T03:44:32.303369+00:00",{"_126":251,"_128":129,"_130":285},8852,"estruturas-1",{"_22":135,"_36":136,"_38":137,"_121":122,"_123":118,"_94":138,"_96":138,"_24":139,"_98":142},{"_22":289,"_36":37,"_38":39,"_121":122,"_123":197,"_94":290,"_96":290,"_24":291,"_98":292},"d1e4567b-f68a-49e1-b3e5-3888343d7871","2025-04-29T04:00:14.680867+00:00",{"_126":129,"_128":129,"_130":148},"resistencia-dos-materiais-7",{"_22":294,"_36":295,"_38":39,"_121":122,"_123":280,"_94":296,"_96":296,"_24":297,"_98":298},"da8d2ecf-e949-4afc-966f-98b4b367fac1","Resistencia dos Materiais","2025-04-29T04:00:06.9766+00:00",{"_126":129,"_128":129,"_130":148},"resistencia-dos-materiais-5",{"_22":249,"_36":300,"_38":301,"_121":122,"_123":-5,"_94":302,"_96":302,"_24":303,"_98":301},"Engenharia","engenharia","2025-04-29T01:55:38.635246+00:00",{"_126":304,"_128":129,"_130":305},29,351586,"tagsTree",[117,308],{"_22":249,"_36":300,"_38":301,"_121":122,"_123":-5,"_94":302,"_96":302,"_24":303,"_98":301,"_132":309},[310,316,322],{"_22":246,"_36":247,"_38":248,"_121":122,"_123":249,"_94":138,"_96":138,"_24":250,"_98":253,"_132":311},[312],{"_22":256,"_36":136,"_38":137,"_121":122,"_123":246,"_94":201,"_96":201,"_24":261,"_98":263,"_132":313},[314],{"_22":255,"_36":37,"_38":39,"_121":122,"_123":256,"_94":257,"_96":257,"_24":258,"_98":259,"_132":315},[],{"_22":267,"_36":268,"_38":269,"_121":122,"_123":249,"_94":138,"_96":138,"_24":270,"_98":273,"_132":317},[318],{"_22":280,"_36":281,"_38":282,"_121":122,"_123":267,"_94":283,"_96":283,"_24":284,"_98":286,"_132":319},[320],{"_22":294,"_36":295,"_38":39,"_121":122,"_123":280,"_94":296,"_96":296,"_24":297,"_98":298,"_132":321},[],{"_22":200,"_36":275,"_38":276,"_121":122,"_123":249,"_94":138,"_96":138,"_24":277,"_98":278,"_132":323},[324],{"_22":197,"_36":198,"_38":199,"_121":122,"_123":200,"_94":201,"_96":201,"_24":202,"_98":199,"_132":325},[326],{"_22":289,"_36":37,"_38":39,"_121":122,"_123":197,"_94":290,"_96":290,"_24":291,"_98":292,"_132":327},[],"videoDislikes",{},"videoLikes",{},"actionData","errors"]

Comentários