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a=4
Solve the following first order differential equations: (a) \( \frac{d y ...
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a=4
Solve the following first order differential equations: (a) \( \frac{d y}{d x}=\frac{y-x}{y+x} \) (b) \( \left(e^{a y}\right) d x+\left(2 y+a x e^{a y}\right) d y=0 \) (c) \( \frac{d y}{d x}+(\cot x) y=\cos x \)