Bài 1:
1: \(\sqrt{36}=6\)
2: \(\sqrt{81}=9\)
3: \(\sqrt{121}=11\)
4: \(\sqrt{144}=12\)
5: \(\sqrt{0.16}=0.4\)
6: \(\sqrt{2\dfrac{7}{9}}=\dfrac{5}{3}\)
7: \(\sqrt{29}=\sqrt{29}\)
8: \(\sqrt{0}=0\)
Bài 2:
1: \(6< \sqrt{41}\)
2: \(\sqrt{19}>4\)
3: \(\sqrt{21}< 5\)
4: \(7< \sqrt{51}\)
Bài 3:
1: ĐKXĐ: \(x\ge0\)
2: ĐKXĐ: \(x\ge-\dfrac{7}{3}\)
3: ĐKXĐ: \(x\le5\)
4: ĐKXĐ: \(x\ge\dfrac{3}{2}\)
5: ĐKXĐ: \(x< \dfrac{3}{2}\)
Bài 4:
1: \(\sqrt{\left(3-\sqrt{11}\right)^2}=\sqrt{11}-3\)
2: \(\sqrt{\left(\sqrt{17}-4\right)^2}=\sqrt{17}-4\)
3: \(\sqrt{\left(\sqrt{5}-3\right)^2}-\sqrt{\left(2+\sqrt{5}\right)^2}\)
\(=3-\sqrt{5}-2-\sqrt{5}\)
\(=-2\sqrt{5}+1\)
4: \(\sqrt{\left(4-\sqrt{17}\right)^2}-\sqrt{\left(\sqrt{17}-3\right)^2}\)
\(=\sqrt{17}-4-\sqrt{17}+3\)
=-1
