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Question Number 142719 by gsk2684 last updated on 04/Jun/21

find the particular solution  to the differential equation  y^((4)) +21y^((2)) −100y=4(8−29t)e^(−2t) .  solution please.

$$\mathrm{find}\:\mathrm{the}\:\mathrm{particular}\:\mathrm{solution} \\ $$$$\mathrm{to}\:\mathrm{the}\:\mathrm{differential}\:\mathrm{equation} \\ $$$$\mathrm{y}^{\left(\mathrm{4}\right)} +\mathrm{21y}^{\left(\mathrm{2}\right)} −\mathrm{100y}=\mathrm{4}\left(\mathrm{8}−\mathrm{29t}\right)\mathrm{e}^{−\mathrm{2t}} . \\ $$$$\mathrm{solution}\:\mathrm{please}. \\ $$

Commented by gsk2684 last updated on 04/Jun/21

i got the particular solution  y_p =e^(−2t) (1/((D−2)^4 +21(D−2)^2 −100))4(8−29t)  it gives lengthy calculation  send me any formula to compute   easily

$$\mathrm{i}\:\mathrm{got}\:\mathrm{the}\:\mathrm{particular}\:\mathrm{solution} \\ $$$$\mathrm{y}_{\mathrm{p}} =\mathrm{e}^{−\mathrm{2t}} \frac{\mathrm{1}}{\left(\mathrm{D}−\mathrm{2}\right)^{\mathrm{4}} +\mathrm{21}\left(\mathrm{D}−\mathrm{2}\right)^{\mathrm{2}} −\mathrm{100}}\mathrm{4}\left(\mathrm{8}−\mathrm{29t}\right) \\ $$$$\mathrm{it}\:\mathrm{gives}\:\mathrm{lengthy}\:\mathrm{calculation} \\ $$$$\mathrm{send}\:\mathrm{me}\:\mathrm{any}\:\mathrm{formula}\:\mathrm{to}\:\mathrm{compute}\: \\ $$$$\mathrm{easily} \\ $$

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