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Автор - ksenyaaaw

Помогите, пожалуйста, алгебра.

Ответ

Автор - al1812
1.
a.
a +  sqrt{7}
б.
 frac{1}{ sqrt{3 - b} }
в.
c +  sqrt{11}
г.
 frac{1}{ sqrt{21 - b} }

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