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an object 2 cm high is placed 15 cm in front of a f=10 cm lens....

an object 2 cm high is placed 15 cm in front of a f=10 cm lens. A student would like to achieve a final image at 15 cm past the first lens, with an upright image and a final magnification of 3. What additional lens(es) - type and location - are needed to achieve this image. Daw the lens system.

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