Задача 9. Решите уравнение    \(\sqrt {\dfrac{5}{{3 — 2x}}}  = \dfrac{1}{9}.\)

Ответ

ОТВЕТ: — 201.

Решение

\(\sqrt {\dfrac{5}{{3 — 2x}}}  = \dfrac{1}{9}\,\,\,\,\,\, \Leftrightarrow \,\,\,\,\,\,\dfrac{5}{{3 — 2x}} = \dfrac{1}{{81}}\,\,\,\,\, \Leftrightarrow \,\,\,\,\,\,\left\{ {\begin{array}{*{20}{c}}{3 — 2x \ne 0\,\,\,\,\,\,}\\{3 — 2x = 405}\end{array}} \right.\,\,\,\,\,\,\, \Leftrightarrow \,\,\,\,\,\,\left\{ {\begin{array}{*{20}{c}}{x \ne 1,5\,\,\,}\\{x =  — 201}\end{array}} \right.\,\,\,\,\,\, \Leftrightarrow \,\,\,\,\,\,x =  — 201.\)

Ответ: – 201.