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3y = 0",{"_44":200,"_81":87,"_83":201},"6d3c3a1d-8e80-4ff3-b97a-d5b5bca91940","6y'' - y' - y = 0",{"_44":203,"_81":91,"_83":204},"4168ac67-64fd-46ed-a69c-a01dbfcde7ea","y'' - 2y' + y = 0",{"_44":206,"_81":95,"_83":207},"cc7bc8df-6995-4264-ac5a-32ea9b4ed7db","9y'' + 6y' + y = 0",{"_44":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],{"_44":214,"_58":215,"_60":216,"_150":151,"_152":217,"_123":165,"_125":165,"_46":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":43,"_44":224,"_78":225,"_101":237,"_102":238,"_52":239},"6831a9b9-c9a4-4a76-bd7a-2ce98bfea875","93a32dd4-5fc6-4ccb-a76f-4724bf113742",[226,229,232,234],{"_44":227,"_81":82,"_83":228},"13e3f476-a0a5-421f-b47e-0969e8e9a7e0","

Verdadeiro, verdadeiro, falso

",{"_44":230,"_81":87,"_83":231},"c9a20855-d84b-4860-8b35-9784818282cf","

Falso, verdadeiro, verdadeiro

",{"_44":223,"_81":91,"_83":233},"

Verdadeiro, falso, verdadeiro

",{"_44":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":43,"_44":242,"_78":243,"_101":258,"_102":259,"_52":260},"3ce109b1-6cdb-4b4d-8816-a6af4d74bed0","c478a46c-46a8-4942-ae14-2e79def3dda2",[244,247,250,252,255],{"_44":245,"_81":82,"_83":246},"a5a16a42-3e58-4c76-80f2-c291aa2d8e49","Sim",{"_44":248,"_81":87,"_83":249},"5e6d0254-696c-4da0-b572-82e3a19f433e","Não",{"_44":241,"_81":91,"_83":251},"Indeterminado",{"_44":253,"_81":95,"_83":254},"35403f68-a880-429d-97f4-db507c58de38","Todos",{"_44":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],{"_44":263,"_58":59,"_60":61,"_150":151,"_152":214,"_123":264,"_125":264,"_46":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",{"_44":147,"_58":148,"_60":149,"_150":151,"_152":-5,"_123":153,"_125":153,"_46":154,"_127":149},{"_44":164,"_58":59,"_60":61,"_150":151,"_152":147,"_123":165,"_125":165,"_46":166,"_127":169},{"_44":217,"_58":271,"_60":272,"_150":151,"_152":-5,"_123":273,"_125":273,"_46":274,"_127":272},"Engenharia","engenharia","2025-04-29T01:55:38.635246+00:00",{"_155":275,"_157":158,"_159":276},29,351586,"tagsTree",[146,279],{"_44":217,"_58":271,"_60":272,"_150":151,"_152":-5,"_123":273,"_125":273,"_46":274,"_127":272,"_161":280},[281],{"_44":214,"_58":215,"_60":216,"_150":151,"_152":217,"_123":165,"_125":165,"_46":218,"_127":221,"_161":282},[283],{"_44":263,"_58":59,"_60":61,"_150":151,"_152":214,"_123":264,"_125":264,"_46":265,"_127":267,"_161":284},[],"videoDislikes",{},"videoLikes",{},"actionData","errors"]

Comentários