Third Order Differential Equation Variation of Parameters: y''' - 3y'' + 2y' = e^(2x)/(1 + e^x)

[@lishylin291]

thank you so much, this is a lifesaver!

[@楊勝銘-o3l]

helps a lot! Thank you! ^^

[@joseluishuamanihusca1157]

like

[@ARick_499]

Too lengthy but easy

[@СнежныйБарс-г2я]

3//28.01.2021.