OGE 2021. Mathematics. Option 47. Collection of 50 options. Edited by I.V. Yashchenko, Tasks 1-19.
Analysis of Option 47 from the collection "Mathematics. OGE 2021. 50 Options," edited by I.V. Yashchenko, tasks 1-19.
Analysis and practice of tasks 1-24 with a tutor for 250 rubles per month. Details in the VK group: https://vk.com/secretroom2021
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