\(\frac{\sqrt{2}}{\sqrt{6}}\)=\(\frac{\sqrt{2}}{\sqrt{2}\sqrt{3}}\)=\(\frac{1}{\sqrt{3}}\)
\(\sqrt{\frac{2}{6}=}\frac{\sqrt{3}}{3}\)
\(\sqrt{81}=9\)
\(\sqrt{\frac{81}{27}}=\sqrt{3}\)
\(\sqrt{\frac{2}{4}}=\frac{\sqrt{2}}{2}\)
\(\sqrt{32}=4\sqrt{2}\)
\(\sqrt{42}=\sqrt{42}\)
\(\sqrt{18}=3\sqrt{2}\)
Làm bừa chả biết có đúng không nữa
\(\sqrt{\frac{2}{6}}=\sqrt{\frac{1}{3}}=\sqrt{\frac{3}{9}}=\frac{\sqrt{3}}{\sqrt{9}}=\frac{\sqrt{3}}{3}\)
\(\sqrt{81}=\sqrt{9^2}=9\)
\(\sqrt{\frac{81}{27}}=\sqrt{3}\)
\(\sqrt{\frac{2}{4}}=\frac{\sqrt{2}}{2}\)
\(\sqrt{32}=\sqrt{16\cdot2}=\sqrt{16}\cdot\sqrt{2}=4\cdot\sqrt{2}\)
\(\sqrt{42}=?\)
\(\sqrt{18}=\sqrt{2}\cdot\sqrt{9}=3\cdot\sqrt{2}\)
\(\sqrt{\frac{2}{3}=}\frac{\sqrt{3}}{3}\)
\(\sqrt{81}=9\)
\(\sqrt{\frac{81}{27}}=\sqrt{3}\)
\(\sqrt{\frac{2}{4}}=\frac{\sqrt{2}}{2}\)
\(\sqrt{32}=4\sqrt{2}\)
\(\sqrt{42}=\sqrt{42}\)
\(\sqrt{18}=3\sqrt{2}\)
Làm bừa chả biết có đúng không nữa
\(\sqrt{81}=9\)
\(\sqrt{\frac{81}{27}}=\frac{\sqrt{81}}{\sqrt{27}}=\frac{\sqrt{9}\cdot\sqrt{9}}{3\sqrt{3}}=\frac{3\cdot3}{3\sqrt{3}}=\sqrt{3}\)
\(\sqrt{\frac{2}{4}}=\frac{\sqrt{2}}{\sqrt{4}}=\frac{\sqrt{2}}{\sqrt{2}\cdot\sqrt{2}}=\frac{1}{\sqrt{2}}\)
\(\sqrt{32}=\sqrt{16}\cdot\sqrt{2}=4\sqrt{2}\)
\(\sqrt{42}=\sqrt{42}\)
\(\sqrt{18}=\sqrt{9}\cdot\sqrt{2}=3\sqrt{2}\)
\(\sqrt{\frac{2}{6}}=\frac{\sqrt{3}}{3}\)
\(\sqrt{81}=9\)
\(\sqrt{\frac{81}{27}}=\sqrt{3}\)
\(\sqrt{\frac{2}{4}}=\frac{\sqrt{2}}{2}\)
\(\sqrt{32}=4\sqrt{2}\)
\(\sqrt{42}=\sqrt{42}\)
\(\sqrt{18}=3\sqrt{2}\)
