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Обчисли: 1) (2/9)2 = (2 ∙ 2)/(9 ∙ 9) = 4/81; 2) (4/5)3 = (4 ∙ 4 ∙ 4)/(5 ∙ 5 ∙ 5) = 64/125; 3) (11/7)2 = (8/7)2 = (8 ∙ 8)/(7 ∙ 7) = 64/49 = 115/49; 4) (22/3)3 =(8/3)3 = (8 ∙ 8 ∙ 8)/(3 ∙ 3 ∙ 3) = 512/27 = 1826/27.