Final answer:
The domain of the function 4x^3 - 80x^2 + 400x is all real numbers.
Step-by-step explanation:
The domain of a function is the set of all possible input values for which the function is defined.
In this case, we have a polynomial function: 4x^3 - 80x^2 + 400x.
Since polynomials are defined for all real numbers, the domain of this function is all real numbers.
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