Question

calculați pls repede !!

Answer 1

$1).\\ a)...\,\frac{1}{\sqrt2}-\frac{1}{\sqrt{2\cdot3}}=\frac{\sqrt3-1}{\sqrt{2\cdot3}}\\ b)...\;\frac{1}{\sqrt4}-\frac{2}{\sqrt{10}}=\frac{1}{2}-\frac{2}{\sqrt{10}} =\frac{\sqrt{10}-4}{2\sqrt10}$