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Suppose f(x, y, z) = x² + y² + z² and W is the solid cylinder with height 7 and base radius 2 that is centered about the z-axis with its base at z 1. Enter θ as theta. = -1. 0

As an iterated integral,
ᵦ ₑ
∭ f dV ∫ ∫ ∫ __dz dr θ
ʷ ᵃ ᶜ ᶠ
with limits of integration
A = 0
B = 2π
C= 0
D= 2
E= -1
F = __

User Bosko
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7.4k points

1 Answer

4 votes

Final answer:

The limits for the integral are from 0 to 2 for the radial direction, from -1 to 6 for the z direction, and from 0 to 2π for the angular direction. Therefore, F = 6

Step-by-step explanation:

The student is asking how to set up an iterated integral for the function f(x, y, z) = x² + y² + z² over the volume W of a solid cylinder centered about the z-axis, with a height of 7 and a base radius of 2, and with its base starting at z = -1. Since the cylinder is symmetric about the z-axis and has a circular base, it is natural to use cylindrical coordinates for the integral. To evaluate the integral ∫ f dV, we need to express f in cylindrical coordinates, so f(r, θ, z) = r² + z² where r is the radial distance, θ (theta) is the angle around the axis, and z is the height.

The limits for r will be from 0 to 2 (the radius of the base), for θ from 0 to 2π (completing a full circle around the z-axis), and for z from -1 to 6 (since the height of the cylinder is 7 and it starts at z = -1).

The iterated integral in cylindrical coordinates will be:

∫∫∫ f(r, θ, z) dz dr dθ with limits for z from E = -1 to F = 6, for r from C = 0 to D = 2, and for θ from A = 0 to B = 2π.

User Michael Wyraz
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8.2k points