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problème en optique qcm 19 rangueil 2017


pacesornotpaces

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Bonjour! J'avoue que j'ai un peu de mal à comprendre les constructions en optique et là c'est un exemple tout particulier. Dans ce qcm on a abce vrai et j'avoue que je n'arrive pas à comprendre la construction de la b et la E? Je remercie beaucoup celui qui pourra m'aider!

https://www.noelshack.com/2020-46-3-1605093735-screenshot-2020-11-11-at-12-21-30.png

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