How to Express a Vector in Terms of Basis Vectors?

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Homework Help Overview

The discussion revolves around expressing a vector in terms of given basis vectors in a four-dimensional space. The basis vectors are defined as e1, e2, e3, and e4, and the vector in question is y = (3, 1, 2, 5).

Discussion Character

  • Exploratory, Conceptual clarification

Approaches and Questions Raised

  • Participants attempt to express the vector y using the basis vectors, with one participant questioning the inclusion of a coefficient of 0.5 for e2. Another participant provides an alternative breakdown of the vector into components corresponding to each basis vector.

Discussion Status

The discussion is ongoing, with participants exploring different ways to represent the vector in terms of the basis vectors. There is a question regarding the reasoning behind specific coefficients, indicating a productive inquiry into the representation.

Contextual Notes

There is a potential confusion regarding the coefficients used in the expression of the vector, particularly the mention of 0.5 for e2, which may not align with the expected representation based on the vector's components.

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Homework Statement



Given the basis vector:

e1 = 1 0 0 0
e2 = 0 1 0 0
e3 = 0 0 1 0
e4 = 0 0 0 1

Express the following vector in terms of the basis:

y = 3 1 2 5

Homework Equations



e1 = 1 0 0 0
e2 = 0 1 0 0
e3 = 0 0 1 0
e4 = 0 0 0 1

y = 3 1 2 5

The Attempt at a Solution



= 3(e1) + 0.5(e2) + 2(e3) + 5(e4)
 
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939 said:

Homework Statement



Given the basis vector:

e1 = 1 0 0 0
e2 = 0 1 0 0
e3 = 0 0 1 0
e4 = 0 0 0 1

Express the following vector in terms of the basis:

y = 3 1 2 5

Homework Equations



e1 = 1 0 0 0
e2 = 0 1 0 0
e3 = 0 0 1 0
e4 = 0 0 0 1

y = 3 1 2 5

The Attempt at a Solution



= 3(e1) + 0.5(e2) + 2(e3) + 5(e4)

Why the .5?
 
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Yeah, what he said ^^
 
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(3, 1, 2, 5)= (3, 0, 0, 0)+ (0, 1, 0, 0)+ (0, 0, 2, 0)+ (0, 0, 0, 5)
= 3(1, 0, 0, 0)+ 1(0, 1, 0, 0)+ 2(0, 0, 1, 0)+ 5(0, 0, 0, 1)
= 3e1+ 1e2+ 2e3+ 5e4
 

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