When is magnification positive or negative?

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Solution

Explanation: Magnification
For a virtual image, magnification is positive, but for a real image, it is negative. The image is magnified when $| m | > 1$ . The image is reduced when $| m | < 1$ is used. When $| m | = 1$ , the picture and the object are the same size.
Thus, when it comes to virtual images, magnification is positive, but when it comes to real images, it is negative.

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