Finding Volume triple integral by change of variables

Click For Summary
SUMMARY

The discussion focuses on evaluating the volume triple integral ∫∫∫V 9z² dxdydz, where V is defined by the inequalities -1≤x+y+3z≤1, 1≤2y-z≤7, and -1≤x+y≤1. The user initially attempted to solve the integral using specific bounds but expressed uncertainty about the correctness of their approach. They proposed using a change of variables with u = x+y+3z, v = 2y-z, and w = x+y to achieve constant limits, indicating a more effective method for solving the integral.

PREREQUISITES
  • Understanding of triple integrals in multivariable calculus
  • Familiarity with change of variables in integration
  • Knowledge of inequalities and their geometric interpretations
  • Basic proficiency in evaluating integrals involving polynomial functions
NEXT STEPS
  • Study the method of change of variables in multiple integrals
  • Learn how to derive Jacobians for transformations in triple integrals
  • Explore examples of volume integrals with complex boundaries
  • Practice solving triple integrals using different coordinate systems
USEFUL FOR

Students in calculus courses, educators teaching multivariable calculus, and anyone interested in advanced integration techniques.

nautolian
Messages
34
Reaction score
0

Homework Statement



∫∫∫V 9z2 dxdydz, where V is the solid defined by:

-1≤x+y+3z≤1, 1≤2y-z≤7, -1≤x+y≤1

Homework Equations


The Attempt at a Solution


I did this using the bounds, 1/3(-x-y-1)<=z<=(1/3)(-x-y+1), -x-1<=y<=1-x, -3/2<=x<=1/2 but I think the answer is wrong is there a better way to do this with change of variables? Thanks, any help would be greatly appreciated.
 
Physics news on Phys.org
Well, u = x+y+3z, v = 2y-z, w=x+y would surely give constant limits.
 

Similar threads

  • · Replies 9 ·
Replies
9
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K
Replies
2
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 34 ·
2
Replies
34
Views
3K
  • · Replies 5 ·
Replies
5
Views
2K
Replies
4
Views
3K
Replies
21
Views
3K
Replies
2
Views
1K
  • · Replies 2 ·
Replies
2
Views
2K