A convex mirror of focal length \( f \) forms an image which is \( \frac{1}{n} \) times the obje...

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A convex mirror of focal length \( f \) forms an image which is \( \frac{1}{n} \) times the object. The distance of the object from the mirror is
(a) \( (n-1) f \)
(b) \( \left(\frac{n-1}{n}\right) f \)
(c) \( \left(\frac{n+1}{n}\right) f \)
(d) \( (n+1) f \)
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