3. Which of the following differential equations can be solved by utilizing the method of undetermined coefficients? I: y' – ty + 3y = e" II : y(w) - y = cost – sin t et – cost III: 2y" + 2y' – 6y = -...

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Extracted text: 3. Which of the following differential equations can be solved by utilizing the method of undetermined coefficients? I: y' – ty + 3y = e" II : y(w) - y = cost – sin t et – cost III: 2y" + 2y' – 6y = - t IV : y" +3y' – 2y = tan t +t A) only II B) I and III C) I and II D) II and IV E)III and IV