1. Вычислите: \(\dfrac{\sqrt{4}}{\sqrt{2}\cdot\sqrt{98}}\)

\(\sqrt{4}=2\), а \(\sqrt{2}\cdot\sqrt{98}=\sqrt{196}=14\).

\(\dfrac{2}{14}=\dfrac{1}{7}\).

Ответ: \(\dfrac{1}{7}\).