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Which expression is equivalent to [tex]\sqrt[3]{x^5 y}[/tex]?

A. [tex]x^{\frac{5}{3}} y[/tex]
B. [tex]x^{\frac{5}{3}} y^{\frac{1}{3}}[/tex]
C. [tex]x^{\frac{3}{5}} y[/tex]
D. [tex]x^{\frac{3}{5}} y^3[/tex]

Sagot :

To determine which expression is equivalent to \(\sqrt[3]{x^5 y}\), we can follow the properties of exponents and radicals.

1. Recall the property of radicals which states that \(\sqrt[n]{a} = a^{1/n}\). Applying this to \(\sqrt[3]{x^5 y}\), we can rewrite it as \((x^5 y)^{1/3}\).

2. According to the properties of exponents, when you have a product within a radical, you can distribute the exponent to each term. Thus,
[tex]\[ (x^5 y)^{1/3} = (x^5)^{1/3} \cdot (y)^{1/3} \][/tex]

3. Now evaluate each term separately:
- For \(x^5\), we use the rule \((a^m)^n = a^{m \cdot n}\):
[tex]\[ (x^5)^{1/3} = x^{5 \cdot 1/3} = x^{5/3} \][/tex]
- For \(y\), applying the exponent of \(1/3\), we get:
[tex]\[ y^{1/3} \][/tex]

4. Combine the results from steps 3:
[tex]\[ (x^5)^{1/3} \cdot (y)^{1/3} = x^{5/3} \cdot y^{1/3} \][/tex]

Thus, the expression that is equivalent to \(\sqrt[3]{x^5 y}\) is:
[tex]\[ x^{\frac{5}{3}} y^{\frac{1}{3}} \][/tex]

Therefore, the correct choice is:
[tex]\[ x^{\frac{5}{3}} y^{\frac{1}{3}} \][/tex]