- Question 6 Find an antiderivative of 9x2-4 24 in the variable x where x * 0. 25 3 points How Did I Do? Remember to include a "+ C" if appropriate. Antiderivative =Question 8 Find the indefinite integral (for a > 0) on the domain of positive real numbers. 3 points How Did I Do? Remember to include a "+ C" if appropriate. Enclose arguments of functions in parentheses. For example, sin (2x). To enter va, type sqrt(a). 13 6 dx