Use the mirror equation to deduct that :
(a) an object between `f` and `2f` of a concave mirror produces a real image beyond `2 f`.
(b) a convax mirror always produces a virtual image independent of the location of the object.
( c) the virtual image produced by a convex mirror is always diminished in size and is located between the focus and the pole.
(d) an object placed between the pole and focus of a concave mirror produces a virtual and enlarged image.

Explanation

Apply mirror equation and the condition:
(a) `flt0` (concave mirror), `u lt 0` (object on left)
(b) `f gt 0, u lt 0`
(c) `f gt 0 " (convex mirror) and "v lt0`
(d) `f lt 0" (concave mirror), "f lt u lt 0`
to deduce the desuired result.