9. Correct. The answer is false. d/dx[f(x)*g(x)] = f'(x)*g(x)+ f(x)*g'(x). d/dx[(x^-3 - 3x²)(6x + 1)] = (-3x^-4 - 6x)(6x + 1)+ 6(x^-3 - 3x²) = -48x² - 6x - 12x^-3 - 3x^-4