Выполнить действие (a > 0, b > 0)

[(ab)^(1/5) - b^(1/5)] / b^(1/5) - a^(1/5) = {[(b)^(1/5)]*(a^(1/5) - 1)} /[ b^(1/5)] - a^(1/5) = = a^(1/5) - 1 - a^(1/5) = -1