[See Solution] (a) Solve x^3(dy)/(dx)+xy^3=9y^3 (b) Solve (d^2y)/(dx^2)+3(dy)/(dx)+4y=0, y(0)=1,
Question: (a) Solve
\[{{x}^{3}}\frac{dy}{dx}+x{{y}^{3}}=9{{y}^{3}}\](b) Solve
\[\frac{{{d}^{2}}y}{d{{x}^{2}}}+3\frac{dy}{dx}+4y=0,\,\,\,y\left( 0 \right)=1,\,\,y\left( 1 \right)=0\]
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