If \( x \) and \( y \) be the distances of the object and image for...

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If \( x \) and \( y \) be the distances of the object and image formed by a concave mirror from its focus and \( f \) be the focal length then
(A) \( x f=y^{2} \)
(B) \( x y=f^{2} \)
\( \mathrm{P} \)
(C) \( x / y=f \)
(D) \( x / y=f^{2} \)
W
() \( \rightarrow \mathrm{CC} \Rightarrow \)
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