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How far from a 38.0-mm-focal-length lens must an object be placed if its image is to...

How far from a 38.0-mm-focal-length lens must an object be placed if its image is to be magnified 2.50× and be real?

How far from a 38.0-mm-focal-length lens must an object be placed if its image is to be magnified 2.50× and be virtual?

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