Question: (a) If a book is held 30 cm from an eyeglass lens with a focal length of 45 cm, where is the image of

(a) If a book is held 30 cm from an eyeglass lens with a focal length of – 45 cm, where is the image of the print formed?
(b) If an eyeglass lens with a focal length of + 57 cm is used, where is the image formed?

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