7. (√8 × √6) / √24

$$\frac{\sqrt{8} \cdot \sqrt{6}}{\sqrt{24}} = \frac{\sqrt{8 \cdot 6}}{\sqrt{24}} = \frac{\sqrt{48}}{\sqrt{24}} = \sqrt{\frac{48}{24}} = \sqrt{2}$$

Ответ: $$ \sqrt{2}$$