A convex lens of focal length is placed in contact with a concave lens of focal length . An object is placed at to the left of this lens system. The distance of the image from the lens in cm is _____ .
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A convex lens of focal length is placed in contact with a concave lens of focal length . An object is placed at to the left of this lens system. The distance of the image from the lens in cm is _____ .
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