JEE Main 2024 — Differential Equations Question with Solution
JEE Main 2024 (08 Apr Shift 2)
Question
Let be the solution of the differential equation , . Then is equal to ________
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Show full solutionCorrect answer: 4
Correct answer
4
Step-by-step explanation
$\begin{aligned}
& a|x|=|y| e^{y x-\beta}, a, b \in N \\
& x d y-y d x+x y(x d y+y d x)=0 \\
& \frac{d y}{y}-\frac{d x}{x}+(x d y+y d x)=0 \\
& \ell n|y|-\ell n|x|+x y=c \\
& y(1)=2 \\
& \ell n|2|-0+2=c \\
& c=2+\ell n 2 \\
& \ell n|y|-\ell n|x|+x y=2+\ell n 2 \\
& \ell n|x|=\ell n\left|\frac{y}{2}\right|-2+x y \\
& |x|=\left|\frac{y}{2}\right| e^{x y-2} \\
& 2|x|=|y| e^{x y-2} \\
& \alpha=2 \quad \beta=2 \quad \alpha+\beta=4
\end{aligned}$
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This is a previous-year question from JEE Main 2024, covering the Differential Equations chapter of Mathematics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.