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# 1988 FRQs AP Calculus

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1988 FRQs AP Calculus

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### 1988 FRQs AP Calculus

1. 1. Calculus WorkBook 88 Name:_______________ Format © 1997 – 1999 MNA Consulting calcpage@aol.com (AB1) Let f be the function given by f(x) = x4 - 16x2 . (a) Find the domain of f. (b) Describe the symmetry, if any, of the graph of f. (c) Find f ’(x). (d) Find the slope of the line normal to the graph of f at x = 5.
2. 2. Calculus WorkBook 88 Name:_______________ Format © 1997 – 1999 MNA Consulting calcpage@aol.com (AB2) A particle moves along the x-axis so that its velocity at any time t ≥≥≥≥ 0 is given by v(t) = 1 - sin(2ππππt). (a) Find the acceleration a(t) of the particle at any time t. (b) Find all values of t, 0 ≤ t ≤ 2, for which the particle is at rest. (c) Find the position x(t) of the particle at any time t if x(0) = 0.
3. 3. Calculus WorkBook 88 Name:_______________ Format © 1997 – 1999 MNA Consulting calcpage@aol.com (AB3) Let R be the region in the first quadrant enclosed by the hyperbola x2 - y2 = 9, the x-axis, and the line x = 5. (a) Find the volume of the solid generated by revolving R about the x-axis. (b) Set up, but do not integrate, an integral expression in terms of a single variable for the volume of the solid generated when R is revolved about the line x = -1.
4. 4. Calculus WorkBook 88 Name:_______________ Format © 1997 – 1999 MNA Consulting calcpage@aol.com (AB4) Let f be the function defined by f(x) = 2xe-x for all real numbers x. (a) Write an equation of the horizontal asymptote for the graph of f. (b) Find the x-coordinate of each critical point of f. For each such x, determine whether f(x) is a relative maximum, a relative minimum, or neither. (c) For what values of x is the graph of f concave down? (d) Using the results found in parts (a), (b), and (c), sketch the graph of y = f(x) in the xy-plane provided below.
5. 5. Calculus WorkBook 88 Name:_______________ Format © 1997 – 1999 MNA Consulting calcpage@aol.com (AB5) Let R be the region in the first quadrant under the graph of y = x x2 + 2 for 0 ≤≤≤≤ x ≤≤≤≤ 6 . (a) Find the area of R. (b) If the line x = k divides R into two regions of equal area, what is the value of k? (c) What is the average value of y = x x2 + 2 on the interval 0 ≤ x ≤ 6 .
6. 6. Calculus WorkBook 88 Name:_______________ Format © 1997 – 1999 MNA Consulting calcpage@aol.com (AB6) Let f be a differentiable function, defined for all real numbers x, with the following properties. (i) f ’(x) = ax2 + bx (ii) f ’(1) = 6 and f ’’(1) = 18 (iii) ⌡⌠ 1 2 f(x)dx = 18 Find f(x). Show your work.
7. 7. Calculus WorkBook 88 Name:_______________ Format © 1997 – 1999 MNA Consulting calcpage@aol.com (BC1) Let f be the function defined by f(x) = (x2 - 3)ex for all real numbers x. (a) For what values of x is f increasing? (b) Find the x-coordinate of each point of inflection of f. (c) Find the x- and y-coordinates of the point, if any, where f(x) attains its absolute minimum.
8. 8. Calculus WorkBook 88 Name:_______________ Format © 1997 – 1999 MNA Consulting calcpage@aol.com 0.5 1 1.5 2 2.5 3 x 1 2 3 4 y (BC2) Let R be the shaded region between the graphs of y = 3 x and y = 3x x2 + 1 from x = 1 to x = 3 , as shown in the figure above. (a) Find the area of R. (b) Find the volume of the solid generated by revolving R about the y-axis.
9. 9. Calculus WorkBook 88 Name:_______________ Format © 1997 – 1999 MNA Consulting calcpage@aol.com B x y A 100 C (BC3) The figure above represents an observer at point A watching balloon B as it rises from point C. The balloon is rising at a constant rate of 3 meters per second and the observer is 100 meters from point C. (a) Find the rate of change in x at the instant when y = 50. (b) Find the rate of change in the area of the right triangle BCA at the instant when y = 50. (c) Find the rate of change in θ at the instant when y = 50.
10. 10. Calculus WorkBook 88 Name:_______________ Format © 1997 – 1999 MNA Consulting calcpage@aol.com (BC4) Determine all values of x for which the series ∑ k = 0 ∞∞∞∞ 2kxk ln(k + 2) converges. Justify your answer.
11. 11. Calculus WorkBook 88 Name:_______________ Format © 1997 – 1999 MNA Consulting calcpage@aol.com 0.25 0.5 0.75 1 1.25 1.5 x 0.2 0.4 0.6 0.8 1 y = 1 - sin x (BC5) The base of a solid S is the shaded region in the xy-plane enclosed by the x-axis, the y-axis, and the graph of y = 1 - sin x, as shown in the figure above. For each x, the cross section of S perpendicular to the x-axis at the point (x, 0) is an isosceles right triangle whose hypotenuse lies in the xy- plane. (a) Find the area of the triangle as a function of x. (b) Find the volume of S.
12. 12. Calculus WorkBook 88 Name:_______________ Format © 1997 – 1999 MNA Consulting calcpage@aol.com (BC6) Let f be a differentiable function defined for all x ≥≥≥≥ 0 such that f(0) = 5 and f(3) = -1. Suppose that for any number b > 0 the average value of f(x) on the interval 0 ≤≤≤≤ x ≤≤≤≤ b is f(0) + f(b) 2 . (a) Find ⌡⌠ 0 3 f(x)dx. (b) Prove that f ’(x) = f(x) - 5 x for all x > 0. (c) Using part (b), find f(x).