(Solved): 8. The general solution of y+6y+9y=xe3x is: (a) y=C1e3x+C2xe3x+e3xlnx ...
8. The general solution of y??+6y?+9y=xe?3x? is: (a) y=C1?e?3x+C2?xe?3x+e?3xlnx (b) y=C1?e?3x+C2?xe?3x+xe?3xlnx (c) y=C1?e?3x+C2?xe?3x?2e?3xlnx (d) y=C1?e3xx+C2?xe3x?21?xe?3xlnx (e) None of the above. 9. A particular solution of y??+9y=3sec3x is (a) z=31?cos3xln?sec3x?+x (b) z=?31?cos3xln?sec3x?+xsin3x (c) z=?3sin3xln?sec3x+tan3x? (d) z=31?sin3xln?sec3x+tan3x?+xcos3x (e) None of the above.