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3y = 0",{"_43":196,"_81":87,"_83":197},"6d3c3a1d-8e80-4ff3-b97a-d5b5bca91940","6y'' - y' - y = 0",{"_43":199,"_81":91,"_83":200},"4168ac67-64fd-46ed-a69c-a01dbfcde7ea","y'' - 2y' + y = 0",{"_43":202,"_81":95,"_83":203},"cc7bc8df-6995-4264-ac5a-32ea9b4ed7db","9y'' + 6y' + y = 0",{"_43":189,"_81":99,"_83":205},"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

",[209],{"_43":210,"_57":211,"_59":212,"_150":151,"_152":213,"_123":214,"_125":214,"_45":215,"_127":212},"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",{"_156":216,"_158":159,"_160":217},4,12302,{"_40":219,"_42":41,"_43":220,"_77":221,"_101":233,"_102":234,"_51":235},"6831a9b9-c9a4-4a76-bd7a-2ce98bfea875","93a32dd4-5fc6-4ccb-a76f-4724bf113742",[222,225,228,230],{"_43":223,"_81":82,"_83":224},"13e3f476-a0a5-421f-b47e-0969e8e9a7e0","

Verdadeiro, verdadeiro, falso

",{"_43":226,"_81":87,"_83":227},"c9a20855-d84b-4860-8b35-9784818282cf","

Falso, verdadeiro, verdadeiro

",{"_43":219,"_81":91,"_83":229},"

Verdadeiro, falso, verdadeiro

",{"_43":231,"_81":95,"_83":232},"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?

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a) ????3 de ????4????5
b) ????2 de ????2????????2
c) ????1 de 2????????1
d) ????1 de 2????2????",[259],{"_43":210,"_57":211,"_59":212,"_150":151,"_152":213,"_123":214,"_125":214,"_45":260,"_127":212},{"_156":216,"_158":159,"_160":217},[262,264,271,281,288,295,297,305,311,316,322,329],{"_43":210,"_57":211,"_59":212,"_150":151,"_152":213,"_123":214,"_125":214,"_45":263,"_127":212},{"_156":216,"_158":159,"_160":217},{"_43":265,"_57":58,"_59":60,"_150":151,"_152":266,"_123":154,"_125":154,"_45":267,"_127":270},"6b6faf95-0e3a-4f58-abc8-e1444c48041d","92339f4f-ed20-4f4c-ad85-0c3de7e04ae0",{"_156":268,"_158":159,"_160":269},2,11846,"termodinamica-3",{"_43":272,"_57":273,"_59":274,"_150":151,"_152":275,"_123":276,"_125":276,"_45":277,"_127":280},"861ad829-750d-4a44-9569-2f18b430b4df","Engenharia Mecatrônica","engenharia-mecatronica","eb9315c5-bd04-4116-aa46-02c4fde320c0","2025-04-29T02:19:12.828432+00:00",{"_156":278,"_158":159,"_160":279},5,30614,"engenharia-mecatronica-1",{"_43":282,"_57":283,"_59":284,"_150":151,"_152":272,"_123":214,"_125":214,"_45":285,"_127":287},"88fe96b3-2a17-4198-90d5-ddda3d6f5d45","Mecânica","mecanica",{"_156":278,"_158":159,"_160":286},25741,"mecanica-3",{"_43":266,"_57":289,"_59":290,"_150":151,"_152":275,"_123":276,"_125":276,"_45":291,"_127":294},"Engenharia Mecânica","engenharia-mecanica",{"_156":292,"_158":159,"_160":293},11,36318,"engenharia-mecanica-2",{"_43":147,"_57":148,"_59":149,"_150":151,"_152":153,"_123":154,"_125":154,"_45":296,"_127":149},{"_156":157,"_158":159,"_160":161},{"_43":298,"_57":299,"_59":300,"_150":151,"_152":-5,"_123":301,"_125":301,"_45":302,"_127":300},"9772e958-72c6-4499-ad47-877cf94d670d","Exatas","exatas","2025-04-29T01:56:45.284172+00:00",{"_156":303,"_158":159,"_160":304},18,135489,{"_43":306,"_57":58,"_59":60,"_150":151,"_152":210,"_123":307,"_125":307,"_45":308,"_127":310},"b21374de-aae5-4a4a-9bf3-0420e731797e","2025-04-29T04:00:14.680867+00:00",{"_156":159,"_158":159,"_160":309},8597,"termodinamica-5",{"_43":213,"_57":312,"_59":313,"_150":151,"_152":275,"_123":276,"_125":276,"_45":314,"_127":315},"Engenharia de Petróleo","engenharia-de-petroleo",{"_156":278,"_158":159,"_160":217},"engenharia-de-petroleo-1",{"_43":153,"_57":317,"_59":318,"_150":151,"_152":298,"_123":276,"_125":276,"_45":319,"_127":321},"Física","fisica",{"_156":292,"_158":159,"_160":320},13777,"fisica-4",{"_43":275,"_57":323,"_59":324,"_150":151,"_152":-5,"_123":325,"_125":325,"_45":326,"_127":324},"Engenharia","engenharia","2025-04-29T01:55:38.635246+00:00",{"_156":327,"_158":159,"_160":328},29,351586,{"_43":330,"_57":58,"_59":60,"_150":151,"_152":282,"_123":331,"_125":331,"_45":332,"_127":333},"f5967cbe-d751-4b40-81f2-04eb5dead2a9","2025-04-29T04:00:13.215003+00:00",{"_156":159,"_158":159,"_160":309},"termodinamica-4","tagsTree",[336,345],{"_43":298,"_57":299,"_59":300,"_150":151,"_152":-5,"_123":301,"_125":301,"_45":337,"_127":300,"_162":338},{"_156":303,"_158":159,"_160":304},[339],{"_43":153,"_57":317,"_59":318,"_150":151,"_152":298,"_123":276,"_125":276,"_45":340,"_127":321,"_162":341},{"_156":292,"_158":159,"_160":320},[342],{"_43":147,"_57":148,"_59":149,"_150":151,"_152":153,"_123":154,"_125":154,"_45":343,"_127":149,"_162":344},{"_156":157,"_158":159,"_160":161},[],{"_43":275,"_57":323,"_59":324,"_150":151,"_152":-5,"_123":325,"_125":325,"_45":346,"_127":324,"_162":347},{"_156":327,"_158":159,"_160":328},[348,357,363],{"_43":272,"_57":273,"_59":274,"_150":151,"_152":275,"_123":276,"_125":276,"_45":349,"_127":280,"_162":350},{"_156":278,"_158":159,"_160":279},[351],{"_43":282,"_57":283,"_59":284,"_150":151,"_152":272,"_123":214,"_125":214,"_45":352,"_127":287,"_162":353},{"_156":278,"_158":159,"_160":286},[354],{"_43":330,"_57":58,"_59":60,"_150":151,"_152":282,"_123":331,"_125":331,"_45":355,"_127":333,"_162":356},{"_156":159,"_158":159,"_160":309},[],{"_43":266,"_57":289,"_59":290,"_150":151,"_152":275,"_123":276,"_125":276,"_45":358,"_127":294,"_162":359},{"_156":292,"_158":159,"_160":293},[360],{"_43":265,"_57":58,"_59":60,"_150":151,"_152":266,"_123":154,"_125":154,"_45":361,"_127":270,"_162":362},{"_156":268,"_158":159,"_160":269},[],{"_43":213,"_57":312,"_59":313,"_150":151,"_152":275,"_123":276,"_125":276,"_45":364,"_127":315,"_162":365},{"_156":278,"_158":159,"_160":217},[366],{"_43":210,"_57":211,"_59":212,"_150":151,"_152":213,"_123":214,"_125":214,"_45":367,"_127":212,"_162":368},{"_156":216,"_158":159,"_160":217},[369],{"_43":306,"_57":58,"_59":60,"_150":151,"_152":210,"_123":307,"_125":307,"_45":370,"_127":310,"_162":371},{"_156":159,"_158":159,"_160":309},[],"videoDislikes",{},"videoLikes",{},"actionData","errors"]

Comentários