Answer Happy

Question 7 Use the appropriate differentiation techniques to determine the f'(x) of the following functions (simplify your answer as far as possible): 7.1 f(x) = (-x³-2x2+5)(x+5x²-x-9). 7.2 f(x) = (-¹)-1. 7.3 f(x) = (-2x² - x)(-3²-4²) € £ €