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An object is 0.5m away from a converging lens with f = 0.4m which is in...

An object is 0.5m away from a converging lens with f = 0.4m which is in turn 0.6m away from a diverging lens with f = −0.6m. How far should the conversing lens be from the object if we want an image with magnification 2.0 assuming that the distance from the converging to diverging lens is fixed?

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