Solve the given IVP: (a) y""+y" - 2y' = 4e-²x/cosx; y(0) = 0.4, y'(0) = −0.4, y″(0) = -0.4

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A: These are simple illustration that I showed in fig.

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A: Solution :-

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A: Integration with infinity

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A: Given that the sequence an is such that an=2.-3n+5n

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A: Given,           0≤x&lt;100, and  x ≡ [3,1] mod [4,5].

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Q: 25. ∞ (−1)" (n+1) 3″ 22n+1 n=1 Answer 26. ☎ (-1)" √ñ In n n=2 27. 27, 28, 29, 30, and 31 Find the…

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A: “Since you have posted multiple questions, we will provide the solution only to the first question…