có . ví dụ như:$\sqrt{\frac{1}{2}}+\sqrt{\frac{1}{2}}=\frac{1}{\sqrt{2}}+\frac{1}{\sqrt{2}}=\frac{2}{\sqrt{2}}=\sqrt{2}$
có . ví dụ như:\sqrt{\frac{1}{2}}+\sqrt{\frac{1}{2}}=\frac{1}{\sqrt{2}}+\frac{1}{\sqrt{2}}=\frac{2}{\sqrt{2}}=\sqrt{2}
có . ví dụ như:
$\sqrt{\frac{1}{2}}+\sqrt{\frac{1}{2}}=\frac{1}{\sqrt{2}}+\frac{1}{\sqrt{2}}=\frac{2}{\sqrt{2}}=\sqrt{2}
$