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Magnification by a lens of an object at distance 10 cm from it is -2. now a seconnd lens is placed exactly at the same positon where first was kept, without changing the distance between object and lens. The magnification by this second lens is -3.
Now both the lenses are kept in contact at the same place. what will be the new magnification ?

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`(a) (-6)/(11) , (b ) (60)/(17) cm`
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