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zfaejou
@zfaejou
September 2021
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hraky
ОДЗ: а не равен -2 и не равен 2
(2-а)/(а+2)-(2а)/(а-2)+(4а^2)/(a^2-4)=((2-a)(a-2)-(2a)(a+2)+4a^2)/(a^2-4)=(2a-4-a^2+2a-2a^2-4a+4a^2)/(a^2-4)=(a^2-4)/(a^2-4)=1
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(2-а)/(а+2)-(2а)/(а-2)+(4а^2)/(a^2-4)=((2-a)(a-2)-(2a)(a+2)+4a^2)/(a^2-4)=(2a-4-a^2+2a-2a^2-4a+4a^2)/(a^2-4)=(a^2-4)/(a^2-4)=1