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2017^2017+2018^2018+2019^2019+2020^2020 calculati ultima cifra

Răspuns :

UC(2017^2017) = 7
UC(2018^2018) = 6
UC(2019^2019) = 9
UC(2020^2020) = 0

UC(2017^2017 + 2018^2018 + 2019^2019 + 2020^2020) = 7 + 6 + 9 + 0 = 22