Final answer:
The most general antiderivative of the function f(x) = 2x³ - 2/3x² + 9x is 1/2x⁴ - 2/9x³ + 9/2x² + C, where C is the constant of integration.
Step-by-step explanation:
To find the most general antiderivative, we need to find the antiderivative of each term separately. The antiderivative of 2x³ is 1/2x⁴, the antiderivative of -2/3x² is -2/9x³, and the antiderivative of 9x is 9/2x². Putting all the terms together, the most general antiderivative is 1/2x⁴ - 2/9x³ + 9/2x² + C, where C is the constant of integration.