Solving a problem in physics section 75 point 15 optics

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15. The eyes of a short-sighted person accommodate, without straining, when examining objects located at a distance of d = 15 cm. The glasses with which optical power are suitable for a person so that the distance of the best vision is d0 = 25 cm.
Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)