An object is placed at a distance \( 2 \mathrm{f} \) from the pole of a convex mirror of focal l...

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An object is placed at a distance \( 2 \mathrm{f} \) from the pole of a convex mirror of focal length \( f \). The linear magnification produced by the mirror is
a. \( \frac{1}{3} \)
b. \( \frac{2}{3} \)
c. \( \frac{3}{4} \)
d. 1
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