MATH 2263 Midterm: MATH 2263 UMN Exam 3 SolutionsFall 08

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31 Jan 2019
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November 25, 2008: (15 points) let b be the box, or rectangular solid: 0 x 2, 0 y 1, 0 z 3. Solution: rrrb(x2 + y)(x z2) dv = rrrb(x3 + xy x2z2 yz2) dv = 3 z2 2yz2i dy dz = r 3. 0 h4 + 2y 8 dy dz = r 3. 3 z2) dz : (15 points) let e be the cylindrical solid x2 + y2 9, 0 z 1. Solution: use cylindrical coordinates: 0 2 , 0 r 3, 0 z 1. Rrre z ex2+y2 r dr d dz = r 1. 0: (20 points) the set e in r3 is described by the inequalities: (a) (5 points) write a description of e in spherical coordinates. px2 + y2 z p9 x2 y2. Solution: e is described by 2 = x2+y2+z2 9 and x2+y2 = 2 sin2 z2 = 2 cos2 , so. 0 3 and 0 .

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