Exam 4: The Derivative in Graphing and Applications

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Sketch the graph of y = x2/3(x -2)2. Find any stationary points, inflection points, and cusps which may or may not exist. Approximate answers to 4 decimal places.

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Answer true or false. A graphing utility can be used to show that Rolle's Theorem can be applied to show that f(x) = (x - 10)2 has a point where f'(x) = 0.

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A rancher is going to build a 3-sided cattle enclosure with a divider down the middle as shown to the right. The cost per foot of the 3 side walls will be $8/foot, while the back wall, being taller, will be $16/foot. If the rancher wishes to enclose an area of 15,000 ft2, what dimensions of the enclosure will minimize his cost? A rancher is going to build a 3-sided cattle enclosure with a divider down the middle as shown to the right. The cost per foot of the 3 side walls will be $8/foot, while the back wall, being taller, will be $16/foot. If the rancher wishes to enclose an area of 15,000 ft<sup>2</sup>, what dimensions of the enclosure will minimize his cost?

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The position function of a particle is given by s(t) = 3t2 -4t + 2. Find the acceleration function.

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Answer true or false. According to Rolle's Theorem if a function's derivative is 0, the graph of the function must cross the y-axis.

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Use a graphing utility to estimate the absolute maximum of f(x) = (x - 2)2 on [-2, 4], if it exists.

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Answer true or false. If f '(x) > 0 for all x on the interval I, then f(x) is concave up on the interval I.

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Find the point on the curve x2 + y2 = 36 closest to (10, 0).

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If f(x) = x(x + 10)3 , find the intervals where f is increasing and where f is decreasing.

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Find the relative extreme values for Find the relative extreme values for   on the interval [-8, 8] and determine where those values occur. on the interval [-8, 8] and determine where those values occur.

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Use Newton's Method to find the greatest x-coordinate of the intersection of y = 4x4 -24x2 and y = 18x2 - 16. Use 9 for your initial value and calculate eight iterations.

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Answer true or false. f(x) = 4x3 - 7x2 + 6 has an absolute maximum and an absolute minimum.

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Answer true or false. f(x) = 6e-x has no relative minimum.

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Answer true or false. For the position function graphed, the acceleration at t = 1 is positive. Answer true or false. For the position function graphed, the acceleration at t = 1 is positive.

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Answer true or false. A fence is to be used to enclose a rectangular plot of land. If there are 1360 feet of fencing, it can be shown that a 340 ft by 340 ft square is the rectangle that can be enclosed with the greatest area. (A square is considered a rectangle.)

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Find the relative extrema for f(x) = x8/7 - 8x-1/7.

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Sketch the graph of Sketch the graph of   . Find any inflectoin points and asymptotes. . Find any inflectoin points and asymptotes.

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The largest interval over which f is increasing for The largest interval over which f is increasing for   is is

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Given f(x) = -x5 + 10x2 . Use a graphing utility to estimate the absolute maximum and minimum values of f, if any, on the interval [0, 3].

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Sketch the graph of y = x2(16-x2). Find any stationary points and any points of inflection.

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