Answer: A
Step-by-step explanation:
A fractional exponent can be written as a number with a radical to the power of the denominator raised to the power of the numerator. It sounds difficult, but is really very easy.
[tex]x^{\frac{4}{13} } =\sqrt[13]{x^{4} } \\x^{\frac{7}{3} } =\sqrt[3]{x^{7} } \\[/tex]
Thus, the answer is A
