Step 1:
We start with the mirror formula and the magnification formula:
\[
\frac{1}{f} = \frac{1}{s_i} + \frac{1}{s_o} \quad \text{and} \quad m = -\frac{s_i}{s_o}
\]
where \(f\) is the focal length, \(s_i\) is the image distance, \(s_o\) is the object distance, and
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