You have a concave (diverging) lens with a −42cm focal length. The magnification produced by the lens for a particular object distance is m = 1/2 and you wish to decrease the magnification to m = 1/5. Determine the distance and direction (away from or closer to the lens) through which the object must be moved in order to accomplish this.
It must be moved ______cm ------ closer to away from the lens.