Question

image formed by a concave mirror first ---when an object is at infinity second ---when an object is beyond the centre of curvature 3rd ---when object is at the centre of the curvature 41th----when an object is between the centre of a capacitor and focus

Answer 1

As we know that there can be different type of images formed based on the convex lens or a concave mirror and concave lens but the first part of the question is asking about image formed by a concave mirror when the object is at infinity.
 When the object is placed at Infinity and the mirror used is concave mirror then you can see the rays are intersecting at the focus and crossing the principal axis therefore the properties of the image formed is real inverted and highly diminished.When the object is placed at the centre of curvature then you can see that the ray of light which is parallel to principal axis that passes through the centre of curvature both of them are intersecting one each other at the point A and we can see the real and inverted and diminished image formed.
When the Ray of light passes parallel through the principal axis and object is placed at the centre of curvature then the image formed will be at the centre of curvature of the same size and real and inverted.
When a ray parallel to the principal axis and object is placed in between centre of curvature and principal focus then the image that will be formed will be beyond C i.e. the centre of curvature and the image will be enlarged and the image will be real and inverted