Question Number 141240 by Ar Brandon last updated on 16/May/21
$$\mathrm{Solve}\:\mathrm{using}\:\mathrm{fourier}'\mathrm{s}\:\mathrm{series} \\ $$$$−\mathrm{y}''+\mathrm{y}=\mathrm{e}^{−\mathrm{2}\mid\mathrm{x}\mid} \\ $$
Solve-using-fourier-s-series-y-y-e-2-x-