故障
发表于 2025-3-21 16:42:10
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伸展
发表于 2025-3-21 23:20:35
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贸易
发表于 2025-3-22 03:56:14
Takashi Kamihigashi,John StachurskiEquations such as.involving derivatives are called differential equations.
CURB
发表于 2025-3-22 07:25:37
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Glycogen
发表于 2025-3-22 12:02:20
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吸引人的花招
发表于 2025-3-22 12:58:35
James B. Campbell,K. M. CharltonLet the equation be.where . and . are constant coefficients.
吸引人的花招
发表于 2025-3-22 18:28:11
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Ambiguous
发表于 2025-3-22 22:38:17
https://doi.org/10.1007/978-1-4039-3778-0If a differential equation cannot be solved by the methods given previously, a solution by the method of series may be attempted.
Obverse
发表于 2025-3-23 02:51:57
https://doi.org/10.1007/978-3-658-35200-4If more than one independent variable is involved in a problem leading to a differential equation the derivatives will be partial. Solving such an equation may present considerable difficulties and general solutions, when obtainable, may be difficult to apply to a particular problem.
N斯巴达人
发表于 2025-3-23 08:25:45
Introduction,Equations such as.involving derivatives are called differential equations.