Let y = y(x) be the solution curve of the differential equation,
$\left( {{y^2} - x} \right){{dy} \over {dx}} = 1$, satisfying y(0) =
1. This curve intersects the x-axis at a point whose abscissa is :
Solution
$\left( {{y^2} - x} \right){{dy} \over {dx}} = 1$
<br><br>$\Rightarrow$ ${{dx} \over {dy}}$ + x = y<sup>2</sup>
<br><br>I.F = ${e^{\int {dy} }}$ = e<sup>y</sup>
<br><br>Solution is given by
<br><br>xe<sup>y</sup> = ${\int {{y^2}{e^y}dy} }$
<br><br>$\Rightarrow$ xe<sup>y</sup> = (y<sup>2</sup> – 2y + 2)e<sup>y</sup> + C
<br><br>y(0) = 1 means x = 0, y = 1
<br><br>$\therefore$ C = -e
<br><br>$\therefore$ xe<sup>y</sup> = (y<sup>2</sup> – 2y + 2)e<sup>y</sup> - e
<br><br>put y = 0
<br><br>$\therefore$ x = 0 – 0 + 2 – e
<br><br>$\Rightarrow$ x = 2 - e
About this question
Subject: Mathematics · Chapter: Differential Equations · Topic: Order and Degree
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