Describe the zero vector (the additive identity) of the vector

Mahagnazk

Mahagnazk

Answered question

2021-11-11

Describe the vector space's zero vector (the additive identity).
R4

Answer & Explanation

Knes1997

Knes1997

Beginner2021-11-12Added 11 answers

So,
v=(v1,v2,v3,v4) 
Find the vector that has following property: 
v+x=x+v=v 
(v1,v2,v3,v3,v4) 
Find the vector that has following property: 
v+x=x+v=v  
(v1,v2,v3,v4)+(x1,x2,x3,x4)=(v1+x1,v2+x2,v3+x3,v4+x4)=(v1,v2,v3,v4) 
v1+x1=v1 
v2+x2=v2 
v3+x3=v3 
v4+x4=v4 
From properties of addition in R, we know that x1=x2=x3=x4=0 
So, additive identity vector is x=(0,0,0,0)
Result: (0,0,0,0)

nick1337

nick1337

Expert2023-06-11Added 777 answers

In the vector space โ„4, the zero vector, denoted as 0, is a special vector that plays a crucial role in vector arithmetic. It has the property that when added to any vector ๐ฏโˆˆโ„4, it does not change the vector. More formally, for any vector ๐ฏ=[v1v2v3v4]โˆˆโ„4, we have:
๐ฏ+0=[v1v2v3v4]+[0000]=[v1+0v2+0v3+0v4+0]=[v1v2v3v4]=๐ฏ
As shown above, adding the zero vector to any vector in โ„4 results in the original vector itself. Geometrically, the zero vector represents the origin of the coordinate system in โ„4.
To further understand the properties of the zero vector, let's consider some operations involving it. Firstly, we can subtract a vector from itself:
๐ฏโˆ’๐ฏ=[v1v2v3v4]โˆ’[v1v2v3v4]=[v1โˆ’v1v2โˆ’v2v3โˆ’v3v4โˆ’v4]=[0000]=0
Subtracting a vector from itself results in the zero vector. Secondly, we can multiply the zero vector by any scalar value:
kยท0=kยท[0000]=[kยท0kยท0kยท0kยท0]=[0000]=0
Multiplying the zero vector by any scalar yields the zero vector itself. These properties showcase the unique role of the zero vector in vector spaces.
Furthermore, the zero vector has another important property related to vector addition. Consider two vectors ๐ฎ=[u1u2u3u4] and ๐ฏ=[v1v2v3v4] in โ„4. The sum of ๐ฎ and bfv is given by:
๐ฎ+๐ฏ=[u1u2u3u4]+[v1v2v3v4]=[u1+v1u2+v2u3+v3u4+v4]
If we introduce the negative of a vector, denoted as โˆ’๐ฏ, which is obtained by multiplying ๐ฏ by โˆ’1, we can rewrite the sum of ๐ฎ and ๐ฏ as follows:
๐ฎ+๐ฏ=[u1u2u3u4]+[v1v2v3v4]=[u1+v1u2+v2u3+v3u4+v4]=[u1+v1u2+v2u3+v3u4+v4]+[0000]=[u1+v1+0u2+v2+0u3+v3+0u4+v4+0]=[u1+v1+(โˆ’v1+v1)u2+v2+(โˆ’v2+v2)u3+v3+(โˆ’v3+v3)u4+v4+(โˆ’v4+v4)]=[(u1+(โˆ’v1))+v1(u2+(โˆ’v2))+v2(u3+(โˆ’v3))+v3(u4+(โˆ’v4))+v4]
We can observe that (โˆ’๐ฏ)+๐ฏ results in the zero vector:
(โˆ’๐ฏ)+๐ฏ=[(โˆ’v1)+v1(โˆ’v2)+v2(โˆ’v3)+v3(โˆ’v4)+v4]=[0000]=0
This property implies that the negative of a vector cancels out the original vector when added together, resulting in the zero vector.
In summary, the zero vector in โ„4 is a special vector that does not change other vectors when added to them. It represents the origin of the coordinate system in
Don Sumner

Don Sumner

Skilled2023-06-11Added 184 answers

Step 1. 0 is an element of R4: 0โˆˆR4.
Step 2. Addition with 0 leaves a vector unchanged: For any vector ๐ฏ=[v1v2v3v4]โˆˆR4, we have ๐ฏ+0=[v1v2v3v4]. In other words, adding 0 to any vector ๐ฏ does not change its value.
Step 3. Scalar multiplication with 0 gives the zero vector: For any scalar cโˆˆR and vector ๐ฏโˆˆR4, we have cยท0=0. Multiplying the zero vector 0 by any scalar c results in the zero vector again.
These properties make 0 an essential element in vector space operations and ensure that R4 is a vector space.
RizerMix

RizerMix

Expert2023-06-11Added 656 answers

0=[0000]
Here, the 0 represents the zero vector, and the [] notation indicates a column vector. The vector has four rows, where each row corresponds to one of the components of the vector. In this case, all the components are zero, so we have four zeros in the column vector.
The zero vector 0 is the additive identity in the vector space โ„4, which means that when it is added to any vector in โ„4, it leaves the vector unchanged. For example, if we have a vector ๐ฏ=[v1v2v3v4] in โ„4, adding the zero vector to ๐ฏ yields the same vector:
๐ฏ+0=[v1v2v3v4]+[0000]=[v1+0v2+0v3+0v4+0]=[v1v2v3v4]=๐ฏ
Thus, the zero vector 0 in โ„4 is the vector that does not change the value of any other vector when added to it.

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