V6x - x2 7 Exercise. Evaluate the indefinite integral, 9 - x4x. 8 Proposition. Use the properties of inverse functions and the known formula for the derivative of the tangent function to show that the derivative of arctangent is given by, dx arctan(x)] - 7 2 + 1 9 Application. A logistic curve is often used in ecoolgy to model the population growth of