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Two lenses are placed along the x axis, with a diverging lens of focal length −8.70...

Two lenses are placed along the x axis, with a diverging lens of focal length −8.70 cm on the left and a converging lens of focal length 17.0 cm on the right. When an object is placed 14.0 cm to the left of the diverging lens, what should the separation s of the two lenses be if the final image is to be focused at x = ∞?

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