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    Integrals

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    Analysis of a Midpoint of a Line Segment

    Let C denote the line segment from z = i to z= 1. By observing that, of all the points on that line segment, the midpoint is the closest to the origin, show that |∫c dz/z^4| ≤ 4 sqrt(2) without evaluating the integral. Please see the attached file for the fully formatted problems.

    Integral of a Semicircle and Segment

    F(z) = z - 1 and C is the arc from z = 0 to z = 2 consisting of (a) the semicircle z = 1 - e^(iθ) (pi ≤ θ ≤ 2pi) (b) the segment 0 ≤ x ≤ 2 of the real axis. Find the integral ∫c f(z) dz for the two cases.

    Limits : Summation Series

    An = 1/ (n+1) + 1/(n+2) + 1/ (n +3) +......+ 1/(n+n) Prove the limit of the sequence exists (or not). (Question also included in attachment)

    Evaluating the Integral

    What is the integral of: Integral (2 --- 0) of x^2/ (4 +x^2)dx = ? A. 2 - ln(2) B. ln(2) - 1/2 C. 2 tan^2(2) + 4 ln[cos(2)] D. 2 ln[sec(2)]-sin^2(2) E. 2 - pi/2

    Integrals : Volume of Solid of Revolution

    26. Let S be the closed region in the first quadrant of the xy-plane bounded by y = sin(pi x/2) and y = x for 0 ≤ x ≤ 1. What is the volume of the closed region in R3 obtained by revolving S about the x-axis? A. 2 - (pi /2) B. pi /6 C. pi /3 D. pi /2 E. (2pi )/3

    Integrals of Fractions

    25.∫(x-8)/(x2 - 4x) dx 6 ---> 8 A. -(47/576) B. 1/6 C. ln (8/9) D. ln 2 E. ln (32/9) A. -31 B. -19 C. 11 D. 30 E. 49 Please explain in detail. Thanks.

    Integral Substitution

    Please solve the attached integral substitution problem {also attached: multiple choice options} Thank you.

    Integrals : Lower Riemann Sum

    Please see the attached file for the fully formatted problems. 21. The region S is bounded by y = x2 - 2x + 3, y = 0, x = 0, and x = 9. Which of the following is the approximation to the area of S obtained by computing the sum of the areas of the 3 inscribed rectangles with bases [0,3], [3,6], and [6,9] (lower Riemann sum)?

    Integrals : Volume of a Solid of Revolution

    20. Let S be the closed region in the first quadrant of the xy-plane bounded by y = 6x2, y = 0, x = 0, and x = 1. What is the volume of the solid obtained by revolving S about the line x = -1? A. 3x B. 7x C. 36x /5 D. 8x E. 56x /5

    Integrals Solved

    19. ∫0 to (pi/4) of x²cos x dx Please see attachment for full question.

    Integral Functions Solved

    18. Let F(x) = ∫0 to x^1/3 (√1+t^4) dt Then F'(0) = A. 0 B. 1/3 C. 2/3 D. 1 E. Does not exist. Please see attachment for full question.

    Integral Functions Solved

    17. If ∫0to1f(x)dx = -1 and ∫0to1g(x)dx= 1 then ∫1to0g(x)dx - ∫0to1 2f(x)dx = A. -3 B. -1 C. 0 D. 1 E. 3 Please see attachment for full question.

    Integral Functions Solved

    15. ∫1 to ∞ 1/ (e^x +1)dx = A. ln (1 + e-1) B. - ln (1 + e-1) C. ln (1 + e) D. arctan (e1/2) E. does not exist Please see attachment

    Finding the Integrals

    14. ∫dx/(x^3) dx -1 --> 2 A. (1/12)ln 8 B. 3/8 C. û(5/12) D. ln 8 E. does not exist

    Integrals : Closed Region - Bounded

    12. What is the area of the closed region bounded by y = x2 - |x| and the x-axis, between x = -1 and x = 1? A. 1/12 B. 1/6 C. 1/3 D. 2/3 E. 5/6

    Integral Functions Given

    Please see the attached file for the fully formatted problems. 11. ∫ x lnx dx 3 -->1 A. -2 + (9/4)ln 3 B. -4 + (9/2)ln 3 C. -(1/4) + (9/4)ln 3 D. -(5/2) + (9/2)ln 3 E. -2 + (9/2)ln 3 Please explain your answer in detail. Thanks.

    Integrals Functions Given

    Please see the attached file for the fully formatted problem. 10. ∫(x2 + 3x - 5)/x2 dx 6-->1 A. 5/6 - 3 ln 6 B. 61/6 + 3 ln 6 C. 5/6 + 3 ln 6 D. 17/6 + 3 ln 6 E. 17/6 - 3 ln 6

    Integrals : Volume of Solid of Revolution

    7. The closed region in the first quadrant bounded by the curves y = x3 and y = x(1/3) is rotated about the x-axis. What is the volume of the resulting solid? A. 1/2 B. 128x /455 C. 16x /35 D. x /2 E. 32x /35

    Integrals : Riemann Sum

    4. Let f(x) = 2x + 1 for 0 =< x =< 1. If the interval [0,1] is partitioned into 4 subintervals of equal length, then what is the smallest Riemann sum for f(x) and this partition? A. 7/4 B. 15/8 C. 2 D. 7/2 E. 7