1. Given f(x) =x - x -20x, -10 S x $ 10. State all of the possible values of x that you must check to find the absolute maximum of the function. (Knowledge --4 marks) 2. Given / (x) = x - Find the absolute maximum and minimum of f (x) over the x+2 interval - 1 5 x $ 3. (Knowledge - 6 marks)