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Two concave lenses, each with f = -13 cm, are separated by 7.5 cm. An object...

Two concave lenses, each with f = -13 cm, are separated by 7.5 cm. An object is placed 20 cm in front of one of the lenses.

a) di = ________________cm in front of the lens closest to the object

b) Find the magnification of the final image produced by this lens combination.

m = __________________

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