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Answer:
[tex]\frac{x^{10} }{49}[/tex]
Step-by-step explanation:
Using the Power-to-power Exponent rule:
[tex](ab^{m} )^{n} = a^{m*n}[/tex]
You can distribute the exponent ² into the fraction inside the parenthesis:
[tex](\frac{x^{5} }{7})^{2} = \frac{x^{5*2} }{7^{2} } = \frac{x^{10} }{49}[/tex]
Therefore, the correct answer is: [tex]\frac{x^{10} }{49}[/tex]