Step-by-step explanation:
The image formed by convex mirror is virtual and erect always.
Let's consider two cases :
(1) When the object is placed at infinity, the image will be formed at the focus and behind the mirror. A point sized image will form and its nature is virtual and erect.
(2) When the object is placed anywhere from infinity to pole of the mirror, then the image will form between pole and focus. Its size is diminished and nature is virtual and erect again.