1. Use a triple integral to find the volume of the solid the tetrahedron enclosed by 2x + y+ z 4 and the coordinate planes.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter9: Systems Of Equations And Inequalities
Section: Chapter Questions
Problem 12T
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Can you answer exercise no. 1?
Example 2. Find the solid above the xy - plane bounded by the elliptic paraboloid z = x2+ 4y² and the cylinder x2 + 4y2 = 4.
Solution. The z limit are 0 to x² + 4y². The y limits for -of the volume are from 0 to -V4 - x². The x limits for the first octant
are from 0 to 2. We evaluate the triple integral by an iterated integral and obtain
Va- x2
2
V4-x²
2+4y²
v=S§ *** dzdydx = f o (x² + 4y²)dydx
2
V =
4-x
4y3
- S [z*y + dx
%3D
= + 2) V4 – x-dx
=--(4 – x²)3/2 + 2xV4 – x² + 8sin
= 4m
Exercise. Solve.
1. Use a triple integral to find the volume of the solid the tetrahedron enclosed by 2x +y+z =4 and the coordinate
planes.
Transcribed Image Text:Example 2. Find the solid above the xy - plane bounded by the elliptic paraboloid z = x2+ 4y² and the cylinder x2 + 4y2 = 4. Solution. The z limit are 0 to x² + 4y². The y limits for -of the volume are from 0 to -V4 - x². The x limits for the first octant are from 0 to 2. We evaluate the triple integral by an iterated integral and obtain Va- x2 2 V4-x² 2+4y² v=S§ *** dzdydx = f o (x² + 4y²)dydx 2 V = 4-x 4y3 - S [z*y + dx %3D = + 2) V4 – x-dx =--(4 – x²)3/2 + 2xV4 – x² + 8sin = 4m Exercise. Solve. 1. Use a triple integral to find the volume of the solid the tetrahedron enclosed by 2x +y+z =4 and the coordinate planes.
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