1. Solve by D operator method d?y 2y +y x2e 3x. dy dx2 dx Solve by method of variation of parameter 2. d?y 2 dx = e* sin x. !! dx2 3. Solve the Cauchy-Euler equation x24y 4. Evaluate L (sint - cos t)². dy dx + 4x+2y = ex. dx2

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