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Answer:

Magnification is positive for virtual images and negative for real images.

If the magnification <1 irrespective of sign, then image is diminished .

If the magnification >1 irrespective of sign, then image is enlarged.

If the magnification =1 irrespective of sign, then image size is same as object size.

Only concave mirrors form virtual enlarged images.

Therefore, mirror is Concave and image is virtual.

Explanation:

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