An object is 0.5 m in front of a converging mirror of focal length 0.2 m. What is the magnification?

Source key: C gives the magnitude 2/3. With u = −0.5 m and f = −0.2 m, v = −1/3 m and signed magnification m = −2/3. The options and printed solution omit the negative sign for the inverted image.