TAILIEUCHUNG - Calculus: An Integrated Approach to Functions and their Rates of Change, Preliminary Edition Part 21

Calculus: An Integrated Approach to Functions and their Rates of Change, Preliminary Edition Part 21. A major complaint of professors teaching calculus is that students don't have the appropriate background to work through the calculus course successfully. This text is targeted directly at this underprepared audience. This is a single-variable (2-semester) calculus text that incorporates a conceptual re-introduction to key precalculus ideas throughout the exposition as appropriate. This is the ideal resource for those schools dealing with poorly prepared students or for schools introducing a slower paced, integrated precalculus/calculus course | Calculating the Slope of a Curve and Instantaneous Rate of Change 181 Therefore the slope of the tangent line is 10 27 the equation of the tangent line is of the form y y1 20 - 0- The tangent line goes through the point -3 -3 -3 5 9 so when 3 y must be 5 9. 5 10 10 5 y 9 27 3 or y 27 3 9 Alternatively the equation of the tangent line can be written 10 5 y - . 7 27 3 In the next section we look at the derivative function. PROBLEMS FOR SECTION The limiting process enables us to get a handle on the slope of a curve and the instantaneous rate of change. Problems 1 through 4 ask for approximations before arriving at an exact answer this is to remind you of the process. 1. Suppose a ball is thrown straight up from a height of 48 feet and given an initial upward velocity of 8 ft sec. Then its height at time i i in seconds is given by A i 16i2 8i 48 for i e 0 2 . In this problem we will look at the ball s velocity at i 1. a At i 1 is the ball heading up or down Explain your reasoning. b By calculating the average rate of change of height with respect to time on the intervals 1 and 1 give bounds for the ball s velocity at i 1. c Improve your bounds by using the intervals 1 and 1 . d Use the limit definition of 1 to find the ball s instantaneous velocity at i 1. 2. Let x 1. In this problem we will look at the slope of the tangent line to x at point P 2 . a Is the slope of the tangent line to at P positive or negative b By calculating the slope of the secant line through P and a nearby point on the graph of approximate 2 . First choose the point with an x-coordinate of . Next choose the point with an x-coordinate of . Now produce an approximation that is better than either of the previous two. c By calculating the limit of the difference quotient find 1 . d Find the equation of the tangent line to at P. 3. Let x x3 and P be the point 1 1 on the graph of . a Approximate the slope of the line tangent to at P by looking at the slope of the .

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