Question

срочно .............................................................................................................

Answer 1

Ответ:

Объяснение:

$\sqrt{\frac{9-4r}{8} } ;\\\frac{9-4r}{8}\geq 0;\\9-4r\geq 0;\\9\geq 4r;\\\frac{9}{4} \geq r;\\\\2,25 \geq r;\\r\leq 2,25$