MCQ
$\frac{{{x^2}}}{{{a^2}}} - \frac{{{y^2}}}{{{b^2}}} = 1,$ તો $\frac{{dy}}{{dx}} = ...........$
  • $\frac{{{b^2}x}}{{{a^2}y}}$
  • B
    $\frac{{{b^2}y}}{{{a^2}x}}$
  • C
    $\frac{{{a^2}x}}{{{b^2}y}}$
  • D
    $\frac{{{a^2}y}}{{{b^2}x}}$

Answer

Correct option: A.
$\frac{{{b^2}x}}{{{a^2}y}}$
A

$\frac{{{x^2}}}{{{a^2}}} - \frac{{{y^2}}}{{{b^2}}} = 1$

$\therefore \frac{2x}{a^2}-\frac{2y}{b^2}\frac{dy}{dx}=0$

$\therefore \frac{2x}{a^2}=\frac{2y}{b^2}\frac{dy}{dx}$

$\therefore \frac{2xb^2}{a^2 2y}=\frac{dy}{dx}$

$\therefore \frac{dy}{dx}=\frac{b^2x}{a^2y}$

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