Question

 Найдите область определения

Answer 1

Ответ:

$[8; +\infty)$

Объяснение:

$\left \{ {{log_{2}x-3 \geq 0} \atop {x > 0}} \right. \Leftrightarrow \left \{ {{log_{2}x \geq 3} \atop {x > 0}} \right. \Leftrightarrow \left \{ {{x \geq 2^{3}} \atop {x > 0}} \right. \Leftrightarrow \left \{ {{x \geq 8} \atop {x > 0}} \right. \Leftrightarrow x \geq 8 \Leftrightarrow x \in [8; +\infty);$