Based on the power of a product property, the exponent is distributed to each term inside the parenthesis.
[tex](m\times n)^x=(m^x\times n^x)[/tex]
Therefore, the expression (7 x 3)^1/3 is equivalent to:
[tex](7\times3)^{\frac{1}{3}}=(7^{\frac{1}{3}}\times3^{\frac{1}{3}})[/tex]
Hence, the given expression in the question is equivalent to Option 4 as shown above.
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