Radical Exponent Forms
1. Express the following in exponential form.
1. $\sqrt[3]{64^2}$ is $64^{\frac{2}{3}}$.
2. $\sqrt[4]{81^3}$ is $81^{\frac{3}{4}}$.
3. $\sqrt[5]{32^3}$ is $32^{\frac{3}{5}}$.
4. $\sqrt{81}$ is $81^{\frac{1}{2}}$.
5. $\sqrt{27^2}$ is $27^{\frac{2}{2}}=27^1$.
2. Transform each expression to radical form.
6. $8^{\frac{2}{3}}$ is $\sqrt[3]{8^2}$.
7. $x^{\frac{1}{2}} y^{\frac{3}{2}}$ is $\sqrt{x} \cdot y^{\frac{3}{2}} = \sqrt{x} \cdot \sqrt{y^3}$.
8. $6 x^{\frac{1}{3}}$ is $6 \sqrt[3]{x}$.
9. $q^{\frac{m}{n}}$ is $\sqrt[n]{q^m}$.
10. $125^{-\frac{1}{3}}$ is $\frac{1}{\sqrt[3]{125}}$.
3. Simplify each radical.
11. $\sqrt[5]{243 m^{10} n^5}$:
- $243 = 3^5$, so $\sqrt[5]{3^5} = 3$.
- $m^{10}$ inside fifth root is $m^{10/5}=m^2$ outside.
- $n^5$ inside fifth root is $n^{5/5}=n$ outside.
So the simplification is $3 m^2 n$.
12. $\sqrt[4]{16} \sqrt{36} x^1 y^2$:
- $\sqrt[4]{16} = \sqrt[4]{2^4} = 2$.
- $\sqrt{36} = 6$.
- So combined constants: $2 \times 6 = 12$.
- Variables $x^1 y^2$ remain as is.
So simplified expression is $12 x y^2$.
4. Rationalize the denominator.
13. $\sqrt[3]{\frac{4}{9x^2}} = \frac{\sqrt[3]{4}}{ \sqrt[3]{9x^2}}$.
To rationalize denominator, multiply numerator and denominator by $\sqrt[3]{9^2 x^4} = 9^{2/3} x^{4/3}$ to get cube root power 3 in denominator.
Denominator becomes $\sqrt[3]{9^3 x^{6}} = 9 x^{2}$.
Numerator becomes $\sqrt[3]{4} \cdot \sqrt[3]{81 x^{4}} = \sqrt[3]{324 x^{4}}$.
Final expression: $\frac{\sqrt[3]{324 x^{4}}}{9 x^{2}}$.
14. $\sqrt[3]{\frac{6}{27 x^{2}}} = \frac{\sqrt[3]{6}}{ \sqrt[3]{27 x^{2}}}$.
Multiply numerator and denominator by $\sqrt[3]{27^{2} x^{4}} = 27^{2/3} x^{4/3}$.
Denominator becomes $\sqrt[3]{27^3 x^{6}} = 27 x^{2}$.
Numerator becomes $\sqrt[3]{6} \cdot \sqrt[3]{729 x^{4}} = \sqrt[3]{4374 x^{4}}$.
Final expression: $\frac{\sqrt[3]{4374 x^{4}}}{27 x^{2}}$.