Question

Дифференциальная уравнения 2.11)
y'+y=e^x*sin(x)

Answer 1

$y'+y=e^x \sin x\\e^xy'+e^xy=e^{2x} \sin x\\(e^xy)'=e^{2x}\sin x\\\\I=\int e^{2x}\sin x\,dx= -e^{2x}\cos x+2e^{2x}\sin x -4\int e^{2x}\sin x\,dx\\=2e^{2x}\sin x-e^{2x}cosx-4I\\I=\frac{2e^{2x}\sin x-e^{2x}cosx}{5}+C_1\\\\e^xy = \frac{2e^{2x}\sin x-e^{2x}cosx}{5}+C_1\\y=\frac{2e^{x}\sin x-e^{x}cosx}{5}+C$