[{"_1":2,"_289":-5,"_290":-5},"loaderData",{"_3":4,"_31":32},"root",{"_5":6,"_28":29,"_30":-5},"registerModalConfig",{"_7":8,"_15":16},"blockedConfig",{"_9":10,"_15":16,"_17":18,"_21":22,"_24":25},"answerQuestion",{"_11":12,"_13":14},"subtitle","Crie sua conta gratuita e utilize todos os nossos recursos de questões disponiveis","title","Para responder, cadastre-se gratuitamente","customBlockedUI",true,"defaultRegister",{"_11":19,"_13":20},"Crie sua conta gratuita e utilize todos os nossos recursos disponíveis","Cadastre-se gratuitamente","imageSearch",{"_11":19,"_13":23},"Para buscar por imagem, cadastre-se gratuitamente","questionAnswer",{"_11":26,"_13":27},"Crie sua conta gratuita e utilize todos os nossos recursos disponíveis para responder","Para ver a resposta, cadastre-se gratuitamente","url","https://prouniversitario.com/exercicios/dfd3bee4-92c1-4f28-adaa-4477a297b868","user","pages/questions/show/index",{"_33":34,"_35":36,"_37":36,"_38":39,"_107":108,"_190":191,"_51":261,"_277":278,"_285":286,"_287":288},"comments",[],"hasVideoHash",false,"isAiGenerated","question",{"_40":41,"_42":41,"_43":44,"_45":46,"_77":78,"_101":41,"_102":103,"_104":105,"_106":16},"correctOptionId","","difficulty","id","dfd3bee4-92c1-4f28-adaa-4477a297b868","metadata",{"_47":48,"_73":74,"_75":76},"pd",{"_49":50,"_51":52,"_53":54,"_61":62,"_63":64,"_65":16,"_66":67,"_68":16,"_69":70,"_71":72},"area","Outros","tags",[],"subjects",[55],{"_43":56,"_57":58,"_59":60},672071,"name","Mecânica","alias","mecanica","materialId","117665469","answerCount",1,"isIndexable","mainSubject",{"_43":56,"_57":58,"_59":60},"isIndexableSEO","materialFormat","Text","studentDegreeLevel","Graduate","source","PD","externalId","137972987","options",[79,85,89,93,97],{"_43":80,"_81":82,"_83":84},"f0b95c92-99de-46f0-927a-f541573d4ddb","label","A","text","elevar a tenacidade superficial, aumentando o teor de Vanádio.",{"_43":86,"_81":87,"_83":88},"662bb389-6b6f-437b-8575-4b9d8e3f34bc","B","elevar a dureza superficial, aumentando o teor de Carbono.",{"_43":90,"_81":91,"_83":92},"bb5b4a0b-a978-4fb1-a50d-afa2e4111714","C","reduzir a resiliência e elevar a tenacidade.",{"_43":94,"_81":95,"_83":96},"6112e4d4-7d23-4beb-bbe2-bba7bb702223","D","reduzir o módulo de elasticidade, diminuindo o teor de Vanádio.",{"_43":98,"_81":99,"_83":100},"66e7a900-b1a6-4941-b1cb-fa2adcd67e12","E","reduzir a fragilidade, diminuindo o teor de Carbono.","solution_explanation","statement","O tratamento termoquímico de cementação é aplicado aos aços com a finalidade de:","status","pending_classification","hasRelatedVideo","relatedVideos",[109],{"_110":111,"_129":130,"_51":145,"_171":172,"_189":146},"content",{"_43":112,"_57":113,"_114":-5,"_115":116,"_117":118,"_119":-5,"_45":120,"_123":124,"_125":124,"_126":-5,"_127":128},"468e3e62-35e0-47be-a15f-68dd43bb32bb","Óptica Geométrica - 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3y = 0",{"_43":200,"_81":87,"_83":201},"6d3c3a1d-8e80-4ff3-b97a-d5b5bca91940","6y'' - y' - y = 0",{"_43":203,"_81":91,"_83":204},"4168ac67-64fd-46ed-a69c-a01dbfcde7ea","y'' - 2y' + y = 0",{"_43":206,"_81":95,"_83":207},"cc7bc8df-6995-4264-ac5a-32ea9b4ed7db","9y'' + 6y' + y = 0",{"_43":193,"_81":99,"_83":209},"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

",[213],{"_43":214,"_57":215,"_59":216,"_150":151,"_152":217,"_123":165,"_125":165,"_45":218,"_127":221},"861ad829-750d-4a44-9569-2f18b430b4df","Engenharia Mecatrônica","engenharia-mecatronica","eb9315c5-bd04-4116-aa46-02c4fde320c0",{"_155":219,"_157":158,"_159":220},5,30614,"engenharia-mecatronica-1",{"_40":223,"_42":41,"_43":224,"_77":225,"_101":237,"_102":238,"_51":239},"6831a9b9-c9a4-4a76-bd7a-2ce98bfea875","93a32dd4-5fc6-4ccb-a76f-4724bf113742",[226,229,232,234],{"_43":227,"_81":82,"_83":228},"13e3f476-a0a5-421f-b47e-0969e8e9a7e0","

Verdadeiro, verdadeiro, falso

",{"_43":230,"_81":87,"_83":231},"c9a20855-d84b-4860-8b35-9784818282cf","

Falso, verdadeiro, verdadeiro

",{"_43":223,"_81":91,"_83":233},"

Verdadeiro, falso, verdadeiro

",{"_43":235,"_81":95,"_83":236},"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?

",[213],{"_40":241,"_42":41,"_43":242,"_77":243,"_101":258,"_102":259,"_51":260},"3ce109b1-6cdb-4b4d-8816-a6af4d74bed0","c478a46c-46a8-4942-ae14-2e79def3dda2",[244,247,250,252,255],{"_43":245,"_81":82,"_83":246},"a5a16a42-3e58-4c76-80f2-c291aa2d8e49","Sim",{"_43":248,"_81":87,"_83":249},"5e6d0254-696c-4da0-b572-82e3a19f433e","Não",{"_43":241,"_81":91,"_83":251},"Indeterminado",{"_43":253,"_81":95,"_83":254},"35403f68-a880-429d-97f4-db507c58de38","Todos",{"_43":256,"_81":99,"_83":257},"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????",[213],[213,262,268,269,270],{"_43":263,"_57":58,"_59":60,"_150":151,"_152":214,"_123":264,"_125":264,"_45":265,"_127":267},"88fe96b3-2a17-4198-90d5-ddda3d6f5d45","2025-04-29T03:44:35.328997+00:00",{"_155":219,"_157":158,"_159":266},25741,"mecanica-3",{"_43":147,"_57":148,"_59":149,"_150":151,"_152":-5,"_123":153,"_125":153,"_45":154,"_127":149},{"_43":164,"_57":58,"_59":60,"_150":151,"_152":147,"_123":165,"_125":165,"_45":166,"_127":169},{"_43":217,"_57":271,"_59":272,"_150":151,"_152":-5,"_123":273,"_125":273,"_45":274,"_127":272},"Engenharia","engenharia","2025-04-29T01:55:38.635246+00:00",{"_155":275,"_157":158,"_159":276},29,351586,"tagsTree",[146,279],{"_43":217,"_57":271,"_59":272,"_150":151,"_152":-5,"_123":273,"_125":273,"_45":274,"_127":272,"_161":280},[281],{"_43":214,"_57":215,"_59":216,"_150":151,"_152":217,"_123":165,"_125":165,"_45":218,"_127":221,"_161":282},[283],{"_43":263,"_57":58,"_59":60,"_150":151,"_152":214,"_123":264,"_125":264,"_45":265,"_127":267,"_161":284},[],"videoDislikes",{},"videoLikes",{},"actionData","errors"]

Comentários