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5. Уравнения \ Тип 3


\(\DeclareMathOperator{\tg}{tg}\)\(\DeclareMathOperator{\ctg}{ctg}\)\(\DeclareMathOperator{\arctg}{arctg}\)\(\DeclareMathOperator{\arcctg}{arcctg}\)
Найдите корень уравнения

\(\sqrt{\dfrac{-7x-8}{-9x-4}}=1\)