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## Homework Statement

An object is magnified, by a factor; of 5, in a concave mirror. The mirror has a focal length of 20cm.

Calculate ALL possible positions of the object.

## Homework Equations

M=Hi/Ho=Di/Do

M=V/U

1/F=1/V+1/U

## The Attempt at a Solution

1/20=1/V + 1/U

-1U=20V/V

U=-20

V=10