(Answered) A peanut is placed 42 cm in front of a two-lens system lens

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A peanut is placed 42 cm in front of a two-lens system: lens 1 (nearest the peanut) has a focal length f1 = 20 cm, lens 2 has f1 = -12 cm, and the lens separation is d = 7 cm. (a) What is the image distance i2 (including sign) for the image produced by lens 2?

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