Given one cross product, find another cross product

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SUMMARY

The discussion centers on calculating the cross product of the vector expression (-3u + 4w) X w, given that u X w = <-7, 1, 8>. The key characteristics of the cross product are highlighted, including the scalar multiplication property and the distributive property. The participant expresses uncertainty about the equations needed to derive the vectors u and w from the given cross product. The focus is on utilizing the properties of the cross product to solve the problem effectively.

PREREQUISITES
  • Understanding of vector operations, specifically cross products.
  • Familiarity with vector properties such as scalar multiplication and distributive laws.
  • Knowledge of trigonometric relationships in vector calculations.
  • Basic algebra skills for manipulating vector equations.
NEXT STEPS
  • Study the properties of the cross product in detail, including u x w = |u||w|sin(theta).
  • Learn how to derive vector components from given cross products.
  • Explore examples of vector manipulation using scalar multiplication and addition.
  • Practice solving vector equations involving cross products with various vector inputs.
USEFUL FOR

Students studying vector calculus, mathematics enthusiasts, and anyone looking to deepen their understanding of vector operations and cross products.

Colts
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Homework Statement


Calculate the cross product assuming that u X w = <-7,1,8>
Find (-3u + 4w) X w = ?


Homework Equations


I'm not sure. I know you have to relate the cross product to something inorder to find what u and w are, but don't know what equations to use.


The Attempt at a Solution


Don't know where to start
 
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I think it is best if you use these 3 characteristics.
1. u x w = u w sin(theta)
2. λu x w = λ (u x w)
3. (u + v) x w= u x w + v x w
 

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