dy ex sinx = dx' x√x²+1 [6] 2.1. Find the points on the graph of f(x) = 8x x²+1' where the tangent line is horizontal. [5] 2.2. 7 2.3. Find the point where the graph of f(x) = -x² - 6 is parallel to the line y = 4x - 1. Determine the turning points and status of concavity at the turning points of f(x) = x² - 2x² + [8] Hence sketch the graph of the function.
