The answer is D
hope this helped
(5x^3y^4)^3/7
= 7th root of (5 x^3 y^4)^3
= 7th root of (5^3 x^9 y^12)
= 7th root of (125 x^9 y^12)
Answer is the last option
7th root of (125 x^9 y^12)
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