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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

",[185],{"_21":186,"_34":187,"_36":188,"_124":125,"_126":189,"_97":190,"_99":190,"_23":191,"_101":188},"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",{"_130":192,"_132":133,"_134":193},4,12302,{"_18":195,"_20":19,"_21":196,"_55":197,"_75":209,"_76":210,"_28":211},"6831a9b9-c9a4-4a76-bd7a-2ce98bfea875","93a32dd4-5fc6-4ccb-a76f-4724bf113742",[198,201,204,206],{"_21":199,"_59":60,"_61":200},"13e3f476-a0a5-421f-b47e-0969e8e9a7e0","

Verdadeiro, verdadeiro, falso

",{"_21":202,"_59":65,"_61":203},"c9a20855-d84b-4860-8b35-9784818282cf","

Falso, verdadeiro, verdadeiro

",{"_21":195,"_59":69,"_61":205},"

Verdadeiro, falso, verdadeiro

",{"_21":207,"_59":73,"_61":208},"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????",[235],{"_21":186,"_34":187,"_36":188,"_124":125,"_126":189,"_97":190,"_99":190,"_23":236,"_101":188},{"_130":192,"_132":133,"_134":193},[238,240,247,257,264,271,273,281,287,292,298,305],{"_21":186,"_34":187,"_36":188,"_124":125,"_126":189,"_97":190,"_99":190,"_23":239,"_101":188},{"_130":192,"_132":133,"_134":193},{"_21":241,"_34":35,"_36":37,"_124":125,"_126":242,"_97":128,"_99":128,"_23":243,"_101":246},"6b6faf95-0e3a-4f58-abc8-e1444c48041d","92339f4f-ed20-4f4c-ad85-0c3de7e04ae0",{"_130":244,"_132":133,"_134":245},2,11846,"termodinamica-3",{"_21":248,"_34":249,"_36":250,"_124":125,"_126":251,"_97":252,"_99":252,"_23":253,"_101":256},"861ad829-750d-4a44-9569-2f18b430b4df","Engenharia Mecatrônica","engenharia-mecatronica","eb9315c5-bd04-4116-aa46-02c4fde320c0","2025-04-29T02:19:12.828432+00:00",{"_130":254,"_132":133,"_134":255},5,30614,"engenharia-mecatronica-1",{"_21":258,"_34":259,"_36":260,"_124":125,"_126":248,"_97":190,"_99":190,"_23":261,"_101":263},"88fe96b3-2a17-4198-90d5-ddda3d6f5d45","Mecânica","mecanica",{"_130":254,"_132":133,"_134":262},25741,"mecanica-3",{"_21":242,"_34":265,"_36":266,"_124":125,"_126":251,"_97":252,"_99":252,"_23":267,"_101":270},"Engenharia Mecânica","engenharia-mecanica",{"_130":268,"_132":133,"_134":269},11,36318,"engenharia-mecanica-2",{"_21":121,"_34":122,"_36":123,"_124":125,"_126":127,"_97":128,"_99":128,"_23":272,"_101":123},{"_130":131,"_132":133,"_134":135},{"_21":274,"_34":275,"_36":276,"_124":125,"_126":-5,"_97":277,"_99":277,"_23":278,"_101":276},"9772e958-72c6-4499-ad47-877cf94d670d","Exatas","exatas","2025-04-29T01:56:45.284172+00:00",{"_130":279,"_132":133,"_134":280},18,135489,{"_21":282,"_34":35,"_36":37,"_124":125,"_126":186,"_97":283,"_99":283,"_23":284,"_101":286},"b21374de-aae5-4a4a-9bf3-0420e731797e","2025-04-29T04:00:14.680867+00:00",{"_130":133,"_132":133,"_134":285},8597,"termodinamica-5",{"_21":189,"_34":288,"_36":289,"_124":125,"_126":251,"_97":252,"_99":252,"_23":290,"_101":291},"Engenharia de Petróleo","engenharia-de-petroleo",{"_130":254,"_132":133,"_134":193},"engenharia-de-petroleo-1",{"_21":127,"_34":293,"_36":294,"_124":125,"_126":274,"_97":252,"_99":252,"_23":295,"_101":297},"Física","fisica",{"_130":268,"_132":133,"_134":296},13777,"fisica-4",{"_21":251,"_34":299,"_36":300,"_124":125,"_126":-5,"_97":301,"_99":301,"_23":302,"_101":300},"Engenharia","engenharia","2025-04-29T01:55:38.635246+00:00",{"_130":303,"_132":133,"_134":304},29,351586,{"_21":306,"_34":35,"_36":37,"_124":125,"_126":258,"_97":307,"_99":307,"_23":308,"_101":309},"f5967cbe-d751-4b40-81f2-04eb5dead2a9","2025-04-29T04:00:13.215003+00:00",{"_130":133,"_132":133,"_134":285},"termodinamica-4","tagsTree",[312,321],{"_21":274,"_34":275,"_36":276,"_124":125,"_126":-5,"_97":277,"_99":277,"_23":313,"_101":276,"_136":314},{"_130":279,"_132":133,"_134":280},[315],{"_21":127,"_34":293,"_36":294,"_124":125,"_126":274,"_97":252,"_99":252,"_23":316,"_101":297,"_136":317},{"_130":268,"_132":133,"_134":296},[318],{"_21":121,"_34":122,"_36":123,"_124":125,"_126":127,"_97":128,"_99":128,"_23":319,"_101":123,"_136":320},{"_130":131,"_132":133,"_134":135},[],{"_21":251,"_34":299,"_36":300,"_124":125,"_126":-5,"_97":301,"_99":301,"_23":322,"_101":300,"_136":323},{"_130":303,"_132":133,"_134":304},[324,333,339],{"_21":248,"_34":249,"_36":250,"_124":125,"_126":251,"_97":252,"_99":252,"_23":325,"_101":256,"_136":326},{"_130":254,"_132":133,"_134":255},[327],{"_21":258,"_34":259,"_36":260,"_124":125,"_126":248,"_97":190,"_99":190,"_23":328,"_101":263,"_136":329},{"_130":254,"_132":133,"_134":262},[330],{"_21":306,"_34":35,"_36":37,"_124":125,"_126":258,"_97":307,"_99":307,"_23":331,"_101":309,"_136":332},{"_130":133,"_132":133,"_134":285},[],{"_21":242,"_34":265,"_36":266,"_124":125,"_126":251,"_97":252,"_99":252,"_23":334,"_101":270,"_136":335},{"_130":268,"_132":133,"_134":269},[336],{"_21":241,"_34":35,"_36":37,"_124":125,"_126":242,"_97":128,"_99":128,"_23":337,"_101":246,"_136":338},{"_130":244,"_132":133,"_134":245},[],{"_21":189,"_34":288,"_36":289,"_124":125,"_126":251,"_97":252,"_99":252,"_23":340,"_101":291,"_136":341},{"_130":254,"_132":133,"_134":193},[342],{"_21":186,"_34":187,"_36":188,"_124":125,"_126":189,"_97":190,"_99":190,"_23":343,"_101":188,"_136":344},{"_130":192,"_132":133,"_134":193},[345],{"_21":282,"_34":35,"_36":37,"_124":125,"_126":186,"_97":283,"_99":283,"_23":346,"_101":286,"_136":347},{"_130":133,"_132":133,"_134":285},[],"videoDislikes",{},"videoLikes",{},"actionData","errors"]

Comentários