How Do Basis and Vectors Work in Linear Algebra?

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SUMMARY

This discussion focuses on the application of basis and vectors in linear algebra, specifically addressing how to express a vector in terms of a given basis. The user is guided to express vector \( v \) as a linear combination of basis vectors \( (1,0,1) \), \( (1,1,0) \), and \( (0,1,1) \) using coordinates \( (x_1, x_2, x_3)^T \). Additionally, the discussion highlights the expression of vector \( w \) as a combination of basis vectors \( v_1, v_2, v_3 \) with specific coefficients. The emphasis is on solving the system of equations to find the coordinates of the vectors.

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  • Understanding of linear combinations in linear algebra
  • Familiarity with vector spaces and basis vectors
  • Knowledge of solving systems of linear equations
  • Proficiency in matrix notation and operations
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Students and educators in mathematics, particularly those studying linear algebra, as well as professionals working in fields that require vector space analysis and manipulation.

Kaspelek
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Hi guys,

I'm back and have another Linear Albgera question!

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Thanks in advance.

No idea how to start
 
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In both cases, you only need to apply the definition of coordinates. For $(a)$ express $v=x_1(1,0,1)+x_2(1,1,0)+x_3(0,1,1)$, solve the system and $[v]_{\mathcal{B}}=(x_1,x_2,x_3)^T$. For $(b)$, $w=1v_1+2v_2-3v_3$, where $\mathcal{B}=\{v_1,v_2,v_3\}$. Let us see what do you obtain.
 

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