The general solution of the differential equation \(\log \left(\frac{d y}{a x}\right)=a x+b y\) is
The general solution of the differential equation \(\log \left(\frac{d y}{a x}\right)=a x+b y\) is
- \(a e^{-b y}+b e^{a x}=c\)
- \(a e^{a x}+b e^{-b y}=c\)
- \(a e^{-b y}-b e^{a x}=c\)
- \(a e^{b y}+b e^{-a x}=c\)
Solution
Given differential equation
\(\begin{array}{llll}
& \log \left(\frac{d y}{d x}\right) =a x+b y \\
\Rightarrow & \frac{d y}{d x}=e^{a x+b y} =e^{a x} \cdot e^{b y} \\
\Rightarrow & \int e^{-b y} d y =\int e^{a x} d x \Rightarrow-\frac{1}{b} e^{-b y}=\frac{1}{a} e^{a x}+c^1 \\
\Rightarrow & b e^{a x}+a e^{-b y} =c
\end{array}\)
Hence, option (a) is correct.
Asked in: AP EAMCET 2020 (21 Sep Shift 2)
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