Question

Сократить дробь: в числителе а-9а^1/2

в знаменателе 7а^1/4+21 

Answer 1

a - 9*a^(1/2)         a^(1/2) * (a^(1/4) - 3) * (a^(1/4) + 3)

------------------- = ------------------------------------------------ =

7 * a^(1/4) + 21                 7 * (a^(1/4) + 3)

 

a^(1/2) * (a^(1/4) - 3)

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              7