Use the mirror equation to deduce that :
an object between the pole and focus of a concave mirror produces a virtual and enlarged image.

Explanation

In case of a concave mirror, u and f are both negative , The general equation of mirror is
`(1)/(v) = (1)/(f) - (1)/(u)`
When the object lies between the pole and the focus,
`f lt u lt 0 or, (1)/(f) - (1)/(u) gt 0`
`therefore (1)/(v) gt 0` [using the mirror equation]
i.e., v is positive and lies to the right pole,
Since `v gt |u|,m` is positive and greater than 1. So that image is enlarged.