If (x+y x-y )=a^2, then d^2 y d x^2 = - Vidyadip

MCQ

If $\sec \left(\frac{x+y}{x-y}\right)=a^2$, then $\frac{d^2 y}{d x^2}=\ldots$

A
$y$
B
$x$
C
$\frac{y}{x}$

✓

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