Ответы на вопрос:
(⁴√a³ - ⁴√a + √a - 1)/(a - √a) = (a^3/4 - a^1/4 + a^1/2 - 1)/(a - a^1/2) = (a1/4*(a^1/2 - 1) + (a^1/2 -1))/a^1/2(a^1/2 - 1) = (a^1/4 + 1)(a^1/2 - 1)/a^1/2(a^1/2 - 1) = (a^1/4 + 1)/a^1/2 = (⁴√a + 1)/√a = √a(⁴√a + 1)/a
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