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    Pongkoj Das

    1.(D^(4)+2a^(2)D^(2)+a^(4))y=8 cos ax

    2.(d^(2))/(dx^(2))+(3dy)/(dx)+2y=sin2x

    3.(d^(2)y)/(dx^(2))+y=sin3xcos2x

    I need solution above those math

     

    Written on Aug. 12, 2020, 12:49 p.m.

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