For all positive numbers x, Δx is defined as the cube root of x, and ▽x is def...【小站备考】

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For all positive numbers x, Δx is defined as the cube root of x, and ▽x is defined as the square root of x. If ▽(Δk) = m^2 , then k =

A. $m^{\frac{12}{5}}$

B. $m^6$

C. $m^12$

D. $m^36$

E. $m^64$

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