Question: (a) How far from a 50.0-mm-focal-length lens must an object be placed if its image is to be magnified 2.00 x and be real? (b)

(a) How far from a 50.0-mm-focal-length lens must an object be placed if its image is to be magnified 2.00 x and be real?
(b) What if the image is to be virtual and magnified 2.00x?

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