Two convex lenses placed in contact form the image of a distant object at P. If the separation between the lenses is increased  a little then the position of point P will be

When the two lenses are in contact equivalent focal length is 1f= 1f1+1f2 when they are seperated by some distance d  then1f'= 1f1+1f2-df1f2 so 1f' is less than 1f   hence  f' is more image will also form at further distance