Ответ:
27⁷+3¹⁸=(3³)⁷+3¹⁸=3²¹+3¹⁸=3¹⁸·(3³+1)=3¹⁸·28=3¹⁸·4·7 - кратно 7
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Ответ:
27⁷+3¹⁸=(3³)⁷+3¹⁸=3²¹+3¹⁸=3¹⁸·(3³+1)=3¹⁸·28=3¹⁸·4·7 - кратно 7